Sample request
CURL
curl --location --request POST 'https://api.pdf.co/v1/pdf/merge' \
--header 'x-api-key: *******************' \
--header 'Content-Type: application/json' \
--data-raw '{
"url": "https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf,https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf",
"async": false
}'
var https = require("https");
var path = require("path");
var fs = require("fs");
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
const SourceFiles = [
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf"
];
// Destination PDF file name
const DestinationFile = "./result.pdf";
// Prepare request to `Merge PDF` API endpoint
var queryPath = `/v1/pdf/merge`;
// JSON payload for api request
var jsonPayload = JSON.stringify({
name: path.basename(DestinationFile), url: SourceFiles.join(",")
});
var reqOptions = {
host: "api.pdf.co",
method: "POST",
path: queryPath,
headers: {
"x-api-key": API_KEY,
"Content-Type": "application/json",
"Content-Length": Buffer.byteLength(jsonPayload, 'utf8')
}
};
// Send request
var postRequest = https.request(reqOptions, (response) => {
response.on("data", (d) => {
// Parse JSON response
var data = JSON.parse(d);
if (data.error == false) {
// Download PDF file
var file = fs.createWriteStream(DestinationFile);
https.get(data.url, (response2) => {
response2.pipe(file)
.on("close", () => {
console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
});
});
}
else {
// Service reported error
console.log(data.message);
}
});
}).on("error", (e) => {
// Request error
console.log(e);
});
// Write request data
postRequest.write(jsonPayload);
postRequest.end();
import os
import requests # pip install requests
# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co
API_KEY = "**********************************"
# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"
# Source PDF files
SourceFile_1 = ".\\sample1.pdf"
SourceFile_2 = ".\\sample2.pdf"
# Destination PDF file name
DestinationFile = ".\\result.pdf"
def main(args = None):
UploadedFileUrl_1 = uploadFile(SourceFile_1)
UploadedFileUrl_2 = uploadFile(SourceFile_2)
if (UploadedFileUrl_1 != None and UploadedFileUrl_2!= None):
uploadedFileUrls = "{},{}".format(UploadedFileUrl_1, UploadedFileUrl_2)
mergeFiles(uploadedFileUrls, DestinationFile)
def mergeFiles(uploadedFileUrls, destinationFile):
"""Perform Merge using PDF.co Web API"""
# Prepare requests params as JSON
parameters = {}
parameters["name"] = os.path.basename(destinationFile)
parameters["url"] = uploadedFileUrls
# Prepare URL for 'Merge PDF' API request
url = "{}/pdf/merge".format(BASE_URL)
# Execute request and get response as JSON
response = requests.post(url, data=parameters, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# Get URL of result file
resultFileUrl = json["url"]
# Download result file
r = requests.get(resultFileUrl, stream=True)
if (r.status_code == 200):
with open(destinationFile, 'wb') as file:
for chunk in r:
file.write(chunk)
print(f"Result file saved as \"{destinationFile}\" file.")
else:
print(f"Request error: {response.status_code} {response.reason}")
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
def uploadFile(fileName):
"""Uploads file to the cloud"""
# 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE.
# Prepare URL for 'Get Presigned URL' API request
url = "{}/file/upload/get-presigned-url?contenttype=application/octet-stream&name={}".format(
BASE_URL, os.path.basename(fileName))
# Execute request and get response as JSON
response = requests.get(url, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# URL to use for file upload
uploadUrl = json["presignedUrl"]
# URL for future reference
uploadedFileUrl = json["url"]
# 2. UPLOAD FILE TO CLOUD.
with open(fileName, 'rb') as file:
requests.put(uploadUrl, data=file, headers={ "x-api-key": API_KEY, "content-type": "application/octet-stream" })
return uploadedFileUrl
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
return None
if __name__ == '__main__':
main()
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace PDFcoApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
static string[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
const string DestinationFile = @".\result.pdf";
static void Main(string[] args)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
// Prepare URL for `Merge PDF` API call
string url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params as JSON
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("name", Path.GetFileName(DestinationFile));
parameters.Add("url", string.Join(",", SourceFiles));
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
webClient.Dispose();
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
}
}
package com.company;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import okhttp3.*;
import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Main
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
final static String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
final static String[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
final static Path DestinationFile = Paths.get(".\\result.pdf");
public static void main(String[] args) throws IOException
{
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();
// Prepare URL for `Merge PDF` API call
String query = "https://api.pdf.co/v1/pdf/merge";
// Make correctly escaped (encoded) URL
URL url = null;
try
{
url = new URI(null, query, null).toURL();
}
catch (URISyntaxException e)
{
e.printStackTrace();
}
// Create JSON payload
String jsonPayload = String.format("{\"name\": \"%s\", \"url\": \"%s\"}",
DestinationFile.getFileName(),
String.join(",", SourceFiles));
// Prepare request body
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonPayload);
// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader("x-api-key", API_KEY) // (!) Set API Key
.addHeader("Content-Type", "application/json")
.post(body)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();
boolean error = json.get("error").getAsBoolean();
if (!error)
{
// Get URL of generated PDF file
String resultFileUrl = json.get("url").getAsString();
// Download PDF file
downloadFile(webClient, resultFileUrl, DestinationFile.toFile());
System.out.printf("Generated PDF file saved as \"%s\" file.", DestinationFile.toString());
}
else
{
// Display service reported error
System.out.println(json.get("message").getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + " " + response.message());
}
}
public static void downloadFile(OkHttpClient webClient, String url, File destinationFile) throws IOException
{
// Prepare request
Request request = new Request.Builder()
.url(url)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
byte[] fileBytes = response.body().bytes();
// Save downloaded bytes to file
OutputStream output = new FileOutputStream(destinationFile);
output.write(fileBytes);
output.flush();
output.close();
response.close();
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cloud API asynchronous "PDF Merging" job example (allows to avoid timeout errors).</title>
</head>
<body>
<?php
// Cloud API asynchronous "PDF Merging" job example.
// Allows to avoid timeout errors when processing huge or scanned PDF documents.
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
$apiKey = "****************************************";
// Direct URLs of PDF files to merge. Check another example if you need to upload local files to the cloud.
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
$sourceFiles = array(
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf");
// Prepare URL for `Merge PDF` API call
$url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params
$parameters = array();
$parameters["url"] = join(",", $sourceFiles);
$parameters["async"] = true; // (!) Make asynchronous job
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
// URL of generated PDF file that will available after the job completion
$resultFileUrl = $json["url"];
// Asynchronous job ID
$jobId = $json["jobId"];
// Check the job status in a loop
do
{
$status = CheckJobStatus($jobId, $apiKey); // Possible statuses: "working", "failed", "aborted", "success".
// Display timestamp and status (for demo purposes)
echo "<p>" . date(DATE_RFC2822) . ": " . $status . "</p>";
if ($status == "success")
{
// Display link to the file with conversion results
echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>";
break;
}
else if ($status == "working")
{
// Pause for a few seconds
sleep(3);
}
else
{
echo $status . "<br/>";
break;
}
}
while (true);
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
function CheckJobStatus($jobId, $apiKey)
{
$status = null;
// Create URL
$url = "https://api.pdf.co/v1/job/check";
// Prepare requests params
$parameters = array();
$parameters["jobid"] = $jobId;
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
$status = $json["status"];
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
return $status;
}
?>
</body>
</html>
{
"pageCount": 2,
"error": false,
"status": 200,
"duration": 356,
"url": "https://pdf-temp-files.s3.us-west-2.amazonaws.com/example/result.pdf",
"name": "result.pdf",
"outputLinkValidTill": "2026-09-30T12:50:42.443680+00:00",
"credits": 4,
"remainingCredits": 87119
}
{
"error": true,
"status": 400,
"message": "Bad request. Typically due to bad input parameters or unreachable input URLs (e.g., access restrictions like login or password)."
}
{
"status": "error",
"errorCode": 401,
"error": true,
"message": "Please provide your API key as \"x-api-key\" header parameter for GET or POST request or as username (\"curl -u <apikey>\") or as url parameter (not recommended). Get your API key at https://app.pdf.co/account"
}
{
"status": "error",
"errorCode": 402,
"error": true,
"message": "Not enough credits, subscription expired or metered use is not allowed. Please review credits on your account at https://app.pdf.co/subscriptions"
}
{
"error": true,
"status": 403,
"message": "Access forbidden for input URL."
}
{
"error": true,
"status": 404,
"message": "The requested resource could not be found."
}
{
"error": true,
"status": 408,
"message": "The server timed out waiting for the request."
}
{
"error": true,
"message": "Too many requests. Your current limit is <limit> requests per minute. Please try again later"
}
{
"error": true,
"status": 441,
"message": "Invalid Password. Password protected document."
}
{
"error": true,
"status": 442,
"message": "Input document is damaged or of incorrect type."
}
{
"error": true,
"status": 443,
"message": "Permissions. The operation is prohibited by document security settings."
}
{
"error": true,
"status": 444,
"message": "Profiles parsing error. Please ensure that the configuration is supported."
}
{
"error": true,
"status": 445,
"message": "Timeout error. For large documents, use asynchronous mode (async=true) and check status via /job/check."
}
{
"error": true,
"status": 446,
"message": "Some files required for conversion are missing."
}
{
"error": true,
"status": 452,
"message": "Invalid URL."
}
{
"error": true,
"status": 454,
"message": "Invalid parameters."
}
{
"error": true,
"status": 500,
"message": "Something went wrong. Please try again or contact support."
}
CURL
curl --location --request POST 'https://api.pdf.co/v1/pdf/merge' \
--header 'x-api-key: *******************' \
--header 'Content-Type: application/json' \
--data-raw '{
"url": "https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf,https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf",
"async": false
}'
var https = require("https");
var path = require("path");
var fs = require("fs");
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
const SourceFiles = [
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf"
];
// Destination PDF file name
const DestinationFile = "./result.pdf";
// Prepare request to `Merge PDF` API endpoint
var queryPath = `/v1/pdf/merge`;
// JSON payload for api request
var jsonPayload = JSON.stringify({
name: path.basename(DestinationFile), url: SourceFiles.join(",")
});
var reqOptions = {
host: "api.pdf.co",
method: "POST",
path: queryPath,
headers: {
"x-api-key": API_KEY,
"Content-Type": "application/json",
"Content-Length": Buffer.byteLength(jsonPayload, 'utf8')
}
};
// Send request
var postRequest = https.request(reqOptions, (response) => {
response.on("data", (d) => {
// Parse JSON response
var data = JSON.parse(d);
if (data.error == false) {
// Download PDF file
var file = fs.createWriteStream(DestinationFile);
https.get(data.url, (response2) => {
response2.pipe(file)
.on("close", () => {
console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
});
});
}
else {
// Service reported error
console.log(data.message);
}
});
}).on("error", (e) => {
// Request error
console.log(e);
});
// Write request data
postRequest.write(jsonPayload);
postRequest.end();
import os
import requests # pip install requests
# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co
API_KEY = "**********************************"
# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"
# Source PDF files
SourceFile_1 = ".\\sample1.pdf"
SourceFile_2 = ".\\sample2.pdf"
# Destination PDF file name
DestinationFile = ".\\result.pdf"
def main(args = None):
UploadedFileUrl_1 = uploadFile(SourceFile_1)
UploadedFileUrl_2 = uploadFile(SourceFile_2)
if (UploadedFileUrl_1 != None and UploadedFileUrl_2!= None):
uploadedFileUrls = "{},{}".format(UploadedFileUrl_1, UploadedFileUrl_2)
mergeFiles(uploadedFileUrls, DestinationFile)
def mergeFiles(uploadedFileUrls, destinationFile):
"""Perform Merge using PDF.co Web API"""
# Prepare requests params as JSON
parameters = {}
parameters["name"] = os.path.basename(destinationFile)
parameters["url"] = uploadedFileUrls
# Prepare URL for 'Merge PDF' API request
url = "{}/pdf/merge".format(BASE_URL)
# Execute request and get response as JSON
response = requests.post(url, data=parameters, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# Get URL of result file
resultFileUrl = json["url"]
# Download result file
r = requests.get(resultFileUrl, stream=True)
if (r.status_code == 200):
with open(destinationFile, 'wb') as file:
for chunk in r:
file.write(chunk)
print(f"Result file saved as \"{destinationFile}\" file.")
else:
print(f"Request error: {response.status_code} {response.reason}")
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
def uploadFile(fileName):
"""Uploads file to the cloud"""
# 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE.
# Prepare URL for 'Get Presigned URL' API request
url = "{}/file/upload/get-presigned-url?contenttype=application/octet-stream&name={}".format(
BASE_URL, os.path.basename(fileName))
# Execute request and get response as JSON
response = requests.get(url, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# URL to use for file upload
uploadUrl = json["presignedUrl"]
# URL for future reference
uploadedFileUrl = json["url"]
# 2. UPLOAD FILE TO CLOUD.
with open(fileName, 'rb') as file:
requests.put(uploadUrl, data=file, headers={ "x-api-key": API_KEY, "content-type": "application/octet-stream" })
return uploadedFileUrl
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
return None
if __name__ == '__main__':
main()
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace PDFcoApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
static string[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
const string DestinationFile = @".\result.pdf";
static void Main(string[] args)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
// Prepare URL for `Merge PDF` API call
string url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params as JSON
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("name", Path.GetFileName(DestinationFile));
parameters.Add("url", string.Join(",", SourceFiles));
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
webClient.Dispose();
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
}
}
package com.company;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import okhttp3.*;
import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Main
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
final static String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
final static String[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
final static Path DestinationFile = Paths.get(".\\result.pdf");
public static void main(String[] args) throws IOException
{
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();
// Prepare URL for `Merge PDF` API call
String query = "https://api.pdf.co/v1/pdf/merge";
// Make correctly escaped (encoded) URL
URL url = null;
try
{
url = new URI(null, query, null).toURL();
}
catch (URISyntaxException e)
{
e.printStackTrace();
}
// Create JSON payload
String jsonPayload = String.format("{\"name\": \"%s\", \"url\": \"%s\"}",
DestinationFile.getFileName(),
String.join(",", SourceFiles));
// Prepare request body
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonPayload);
// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader("x-api-key", API_KEY) // (!) Set API Key
.addHeader("Content-Type", "application/json")
.post(body)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();
boolean error = json.get("error").getAsBoolean();
if (!error)
{
// Get URL of generated PDF file
String resultFileUrl = json.get("url").getAsString();
// Download PDF file
downloadFile(webClient, resultFileUrl, DestinationFile.toFile());
System.out.printf("Generated PDF file saved as \"%s\" file.", DestinationFile.toString());
}
else
{
// Display service reported error
System.out.println(json.get("message").getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + " " + response.message());
}
}
public static void downloadFile(OkHttpClient webClient, String url, File destinationFile) throws IOException
{
// Prepare request
Request request = new Request.Builder()
.url(url)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
byte[] fileBytes = response.body().bytes();
// Save downloaded bytes to file
OutputStream output = new FileOutputStream(destinationFile);
output.write(fileBytes);
output.flush();
output.close();
response.close();
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cloud API asynchronous "PDF Merging" job example (allows to avoid timeout errors).</title>
</head>
<body>
<?php
// Cloud API asynchronous "PDF Merging" job example.
// Allows to avoid timeout errors when processing huge or scanned PDF documents.
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
$apiKey = "****************************************";
// Direct URLs of PDF files to merge. Check another example if you need to upload local files to the cloud.
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
$sourceFiles = array(
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf");
// Prepare URL for `Merge PDF` API call
$url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params
$parameters = array();
$parameters["url"] = join(",", $sourceFiles);
$parameters["async"] = true; // (!) Make asynchronous job
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
// URL of generated PDF file that will available after the job completion
$resultFileUrl = $json["url"];
// Asynchronous job ID
$jobId = $json["jobId"];
// Check the job status in a loop
do
{
$status = CheckJobStatus($jobId, $apiKey); // Possible statuses: "working", "failed", "aborted", "success".
// Display timestamp and status (for demo purposes)
echo "<p>" . date(DATE_RFC2822) . ": " . $status . "</p>";
if ($status == "success")
{
// Display link to the file with conversion results
echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>";
break;
}
else if ($status == "working")
{
// Pause for a few seconds
sleep(3);
}
else
{
echo $status . "<br/>";
break;
}
}
while (true);
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
function CheckJobStatus($jobId, $apiKey)
{
$status = null;
// Create URL
$url = "https://api.pdf.co/v1/job/check";
// Prepare requests params
$parameters = array();
$parameters["jobid"] = $jobId;
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
$status = $json["status"];
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
return $status;
}
?>
</body>
</html>
{
"pageCount": 2,
"error": false,
"status": 200,
"duration": 356,
"url": "https://pdf-temp-files.s3.us-west-2.amazonaws.com/example/result.pdf",
"name": "result.pdf",
"outputLinkValidTill": "2026-09-30T12:50:42.443680+00:00",
"credits": 4,
"remainingCredits": 87119
}
{
"error": true,
"status": 400,
"message": "Bad request. Typically due to bad input parameters or unreachable input URLs (e.g., access restrictions like login or password)."
}
{
"status": "error",
"errorCode": 401,
"error": true,
"message": "Please provide your API key as \"x-api-key\" header parameter for GET or POST request or as username (\"curl -u <apikey>\") or as url parameter (not recommended). Get your API key at https://app.pdf.co/account"
}
{
"status": "error",
"errorCode": 402,
"error": true,
"message": "Not enough credits, subscription expired or metered use is not allowed. Please review credits on your account at https://app.pdf.co/subscriptions"
}
{
"error": true,
"status": 403,
"message": "Access forbidden for input URL."
}
{
"error": true,
"status": 404,
"message": "The requested resource could not be found."
}
{
"error": true,
"status": 408,
"message": "The server timed out waiting for the request."
}
{
"error": true,
"message": "Too many requests. Your current limit is <limit> requests per minute. Please try again later"
}
{
"error": true,
"status": 441,
"message": "Invalid Password. Password protected document."
}
{
"error": true,
"status": 442,
"message": "Input document is damaged or of incorrect type."
}
{
"error": true,
"status": 443,
"message": "Permissions. The operation is prohibited by document security settings."
}
{
"error": true,
"status": 444,
"message": "Profiles parsing error. Please ensure that the configuration is supported."
}
{
"error": true,
"status": 445,
"message": "Timeout error. For large documents, use asynchronous mode (async=true) and check status via /job/check."
}
{
"error": true,
"status": 446,
"message": "Some files required for conversion are missing."
}
{
"error": true,
"status": 452,
"message": "Invalid URL."
}
{
"error": true,
"status": 454,
"message": "Invalid parameters."
}
{
"error": true,
"status": 500,
"message": "Something went wrong. Please try again or contact support."
}
Merge
Merge PDF
Merge multiple PDF files into a single PDF document.
Sample request
CURL
curl --location --request POST 'https://api.pdf.co/v1/pdf/merge' \
--header 'x-api-key: *******************' \
--header 'Content-Type: application/json' \
--data-raw '{
"url": "https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf,https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf",
"async": false
}'
var https = require("https");
var path = require("path");
var fs = require("fs");
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
const SourceFiles = [
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf"
];
// Destination PDF file name
const DestinationFile = "./result.pdf";
// Prepare request to `Merge PDF` API endpoint
var queryPath = `/v1/pdf/merge`;
// JSON payload for api request
var jsonPayload = JSON.stringify({
name: path.basename(DestinationFile), url: SourceFiles.join(",")
});
var reqOptions = {
host: "api.pdf.co",
method: "POST",
path: queryPath,
headers: {
"x-api-key": API_KEY,
"Content-Type": "application/json",
"Content-Length": Buffer.byteLength(jsonPayload, 'utf8')
}
};
// Send request
var postRequest = https.request(reqOptions, (response) => {
response.on("data", (d) => {
// Parse JSON response
var data = JSON.parse(d);
if (data.error == false) {
// Download PDF file
var file = fs.createWriteStream(DestinationFile);
https.get(data.url, (response2) => {
response2.pipe(file)
.on("close", () => {
console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
});
});
}
else {
// Service reported error
console.log(data.message);
}
});
}).on("error", (e) => {
// Request error
console.log(e);
});
// Write request data
postRequest.write(jsonPayload);
postRequest.end();
import os
import requests # pip install requests
# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co
API_KEY = "**********************************"
# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"
# Source PDF files
SourceFile_1 = ".\\sample1.pdf"
SourceFile_2 = ".\\sample2.pdf"
# Destination PDF file name
DestinationFile = ".\\result.pdf"
def main(args = None):
UploadedFileUrl_1 = uploadFile(SourceFile_1)
UploadedFileUrl_2 = uploadFile(SourceFile_2)
if (UploadedFileUrl_1 != None and UploadedFileUrl_2!= None):
uploadedFileUrls = "{},{}".format(UploadedFileUrl_1, UploadedFileUrl_2)
mergeFiles(uploadedFileUrls, DestinationFile)
def mergeFiles(uploadedFileUrls, destinationFile):
"""Perform Merge using PDF.co Web API"""
# Prepare requests params as JSON
parameters = {}
parameters["name"] = os.path.basename(destinationFile)
parameters["url"] = uploadedFileUrls
# Prepare URL for 'Merge PDF' API request
url = "{}/pdf/merge".format(BASE_URL)
# Execute request and get response as JSON
response = requests.post(url, data=parameters, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# Get URL of result file
resultFileUrl = json["url"]
# Download result file
r = requests.get(resultFileUrl, stream=True)
if (r.status_code == 200):
with open(destinationFile, 'wb') as file:
for chunk in r:
file.write(chunk)
print(f"Result file saved as \"{destinationFile}\" file.")
else:
print(f"Request error: {response.status_code} {response.reason}")
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
def uploadFile(fileName):
"""Uploads file to the cloud"""
# 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE.
# Prepare URL for 'Get Presigned URL' API request
url = "{}/file/upload/get-presigned-url?contenttype=application/octet-stream&name={}".format(
BASE_URL, os.path.basename(fileName))
# Execute request and get response as JSON
response = requests.get(url, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# URL to use for file upload
uploadUrl = json["presignedUrl"]
# URL for future reference
uploadedFileUrl = json["url"]
# 2. UPLOAD FILE TO CLOUD.
with open(fileName, 'rb') as file:
requests.put(uploadUrl, data=file, headers={ "x-api-key": API_KEY, "content-type": "application/octet-stream" })
return uploadedFileUrl
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
return None
if __name__ == '__main__':
main()
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace PDFcoApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
static string[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
const string DestinationFile = @".\result.pdf";
static void Main(string[] args)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
// Prepare URL for `Merge PDF` API call
string url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params as JSON
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("name", Path.GetFileName(DestinationFile));
parameters.Add("url", string.Join(",", SourceFiles));
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
webClient.Dispose();
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
}
}
package com.company;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import okhttp3.*;
import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Main
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
final static String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
final static String[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
final static Path DestinationFile = Paths.get(".\\result.pdf");
public static void main(String[] args) throws IOException
{
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();
// Prepare URL for `Merge PDF` API call
String query = "https://api.pdf.co/v1/pdf/merge";
// Make correctly escaped (encoded) URL
URL url = null;
try
{
url = new URI(null, query, null).toURL();
}
catch (URISyntaxException e)
{
e.printStackTrace();
}
// Create JSON payload
String jsonPayload = String.format("{\"name\": \"%s\", \"url\": \"%s\"}",
DestinationFile.getFileName(),
String.join(",", SourceFiles));
// Prepare request body
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonPayload);
// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader("x-api-key", API_KEY) // (!) Set API Key
.addHeader("Content-Type", "application/json")
.post(body)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();
boolean error = json.get("error").getAsBoolean();
if (!error)
{
// Get URL of generated PDF file
String resultFileUrl = json.get("url").getAsString();
// Download PDF file
downloadFile(webClient, resultFileUrl, DestinationFile.toFile());
System.out.printf("Generated PDF file saved as \"%s\" file.", DestinationFile.toString());
}
else
{
// Display service reported error
System.out.println(json.get("message").getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + " " + response.message());
}
}
public static void downloadFile(OkHttpClient webClient, String url, File destinationFile) throws IOException
{
// Prepare request
Request request = new Request.Builder()
.url(url)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
byte[] fileBytes = response.body().bytes();
// Save downloaded bytes to file
OutputStream output = new FileOutputStream(destinationFile);
output.write(fileBytes);
output.flush();
output.close();
response.close();
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cloud API asynchronous "PDF Merging" job example (allows to avoid timeout errors).</title>
</head>
<body>
<?php
// Cloud API asynchronous "PDF Merging" job example.
// Allows to avoid timeout errors when processing huge or scanned PDF documents.
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
$apiKey = "****************************************";
// Direct URLs of PDF files to merge. Check another example if you need to upload local files to the cloud.
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
$sourceFiles = array(
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf");
// Prepare URL for `Merge PDF` API call
$url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params
$parameters = array();
$parameters["url"] = join(",", $sourceFiles);
$parameters["async"] = true; // (!) Make asynchronous job
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
// URL of generated PDF file that will available after the job completion
$resultFileUrl = $json["url"];
// Asynchronous job ID
$jobId = $json["jobId"];
// Check the job status in a loop
do
{
$status = CheckJobStatus($jobId, $apiKey); // Possible statuses: "working", "failed", "aborted", "success".
// Display timestamp and status (for demo purposes)
echo "<p>" . date(DATE_RFC2822) . ": " . $status . "</p>";
if ($status == "success")
{
// Display link to the file with conversion results
echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>";
break;
}
else if ($status == "working")
{
// Pause for a few seconds
sleep(3);
}
else
{
echo $status . "<br/>";
break;
}
}
while (true);
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
function CheckJobStatus($jobId, $apiKey)
{
$status = null;
// Create URL
$url = "https://api.pdf.co/v1/job/check";
// Prepare requests params
$parameters = array();
$parameters["jobid"] = $jobId;
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
$status = $json["status"];
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
return $status;
}
?>
</body>
</html>
{
"pageCount": 2,
"error": false,
"status": 200,
"duration": 356,
"url": "https://pdf-temp-files.s3.us-west-2.amazonaws.com/example/result.pdf",
"name": "result.pdf",
"outputLinkValidTill": "2026-09-30T12:50:42.443680+00:00",
"credits": 4,
"remainingCredits": 87119
}
{
"error": true,
"status": 400,
"message": "Bad request. Typically due to bad input parameters or unreachable input URLs (e.g., access restrictions like login or password)."
}
{
"status": "error",
"errorCode": 401,
"error": true,
"message": "Please provide your API key as \"x-api-key\" header parameter for GET or POST request or as username (\"curl -u <apikey>\") or as url parameter (not recommended). Get your API key at https://app.pdf.co/account"
}
{
"status": "error",
"errorCode": 402,
"error": true,
"message": "Not enough credits, subscription expired or metered use is not allowed. Please review credits on your account at https://app.pdf.co/subscriptions"
}
{
"error": true,
"status": 403,
"message": "Access forbidden for input URL."
}
{
"error": true,
"status": 404,
"message": "The requested resource could not be found."
}
{
"error": true,
"status": 408,
"message": "The server timed out waiting for the request."
}
{
"error": true,
"message": "Too many requests. Your current limit is <limit> requests per minute. Please try again later"
}
{
"error": true,
"status": 441,
"message": "Invalid Password. Password protected document."
}
{
"error": true,
"status": 442,
"message": "Input document is damaged or of incorrect type."
}
{
"error": true,
"status": 443,
"message": "Permissions. The operation is prohibited by document security settings."
}
{
"error": true,
"status": 444,
"message": "Profiles parsing error. Please ensure that the configuration is supported."
}
{
"error": true,
"status": 445,
"message": "Timeout error. For large documents, use asynchronous mode (async=true) and check status via /job/check."
}
{
"error": true,
"status": 446,
"message": "Some files required for conversion are missing."
}
{
"error": true,
"status": 452,
"message": "Invalid URL."
}
{
"error": true,
"status": 454,
"message": "Invalid parameters."
}
{
"error": true,
"status": 500,
"message": "Something went wrong. Please try again or contact support."
}
CURL
curl --location --request POST 'https://api.pdf.co/v1/pdf/merge' \
--header 'x-api-key: *******************' \
--header 'Content-Type: application/json' \
--data-raw '{
"url": "https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf,https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf",
"async": false
}'
var https = require("https");
var path = require("path");
var fs = require("fs");
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
const SourceFiles = [
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf"
];
// Destination PDF file name
const DestinationFile = "./result.pdf";
// Prepare request to `Merge PDF` API endpoint
var queryPath = `/v1/pdf/merge`;
// JSON payload for api request
var jsonPayload = JSON.stringify({
name: path.basename(DestinationFile), url: SourceFiles.join(",")
});
var reqOptions = {
host: "api.pdf.co",
method: "POST",
path: queryPath,
headers: {
"x-api-key": API_KEY,
"Content-Type": "application/json",
"Content-Length": Buffer.byteLength(jsonPayload, 'utf8')
}
};
// Send request
var postRequest = https.request(reqOptions, (response) => {
response.on("data", (d) => {
// Parse JSON response
var data = JSON.parse(d);
if (data.error == false) {
// Download PDF file
var file = fs.createWriteStream(DestinationFile);
https.get(data.url, (response2) => {
response2.pipe(file)
.on("close", () => {
console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
});
});
}
else {
// Service reported error
console.log(data.message);
}
});
}).on("error", (e) => {
// Request error
console.log(e);
});
// Write request data
postRequest.write(jsonPayload);
postRequest.end();
import os
import requests # pip install requests
# The authentication key (API Key).
# Get your own by registering at https://app.pdf.co
API_KEY = "**********************************"
# Base URL for PDF.co Web API requests
BASE_URL = "https://api.pdf.co/v1"
# Source PDF files
SourceFile_1 = ".\\sample1.pdf"
SourceFile_2 = ".\\sample2.pdf"
# Destination PDF file name
DestinationFile = ".\\result.pdf"
def main(args = None):
UploadedFileUrl_1 = uploadFile(SourceFile_1)
UploadedFileUrl_2 = uploadFile(SourceFile_2)
if (UploadedFileUrl_1 != None and UploadedFileUrl_2!= None):
uploadedFileUrls = "{},{}".format(UploadedFileUrl_1, UploadedFileUrl_2)
mergeFiles(uploadedFileUrls, DestinationFile)
def mergeFiles(uploadedFileUrls, destinationFile):
"""Perform Merge using PDF.co Web API"""
# Prepare requests params as JSON
parameters = {}
parameters["name"] = os.path.basename(destinationFile)
parameters["url"] = uploadedFileUrls
# Prepare URL for 'Merge PDF' API request
url = "{}/pdf/merge".format(BASE_URL)
# Execute request and get response as JSON
response = requests.post(url, data=parameters, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# Get URL of result file
resultFileUrl = json["url"]
# Download result file
r = requests.get(resultFileUrl, stream=True)
if (r.status_code == 200):
with open(destinationFile, 'wb') as file:
for chunk in r:
file.write(chunk)
print(f"Result file saved as \"{destinationFile}\" file.")
else:
print(f"Request error: {response.status_code} {response.reason}")
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
def uploadFile(fileName):
"""Uploads file to the cloud"""
# 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE.
# Prepare URL for 'Get Presigned URL' API request
url = "{}/file/upload/get-presigned-url?contenttype=application/octet-stream&name={}".format(
BASE_URL, os.path.basename(fileName))
# Execute request and get response as JSON
response = requests.get(url, headers={ "x-api-key": API_KEY })
if (response.status_code == 200):
json = response.json()
if json["error"] == False:
# URL to use for file upload
uploadUrl = json["presignedUrl"]
# URL for future reference
uploadedFileUrl = json["url"]
# 2. UPLOAD FILE TO CLOUD.
with open(fileName, 'rb') as file:
requests.put(uploadUrl, data=file, headers={ "x-api-key": API_KEY, "content-type": "application/octet-stream" })
return uploadedFileUrl
else:
# Show service reported error
print(json["message"])
else:
print(f"Request error: {response.status_code} {response.reason}")
return None
if __name__ == '__main__':
main()
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace PDFcoApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
static string[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
const string DestinationFile = @".\result.pdf";
static void Main(string[] args)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
// Prepare URL for `Merge PDF` API call
string url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params as JSON
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("name", Path.GetFileName(DestinationFile));
parameters.Add("url", string.Join(",", SourceFiles));
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
webClient.Dispose();
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
}
}
package com.company;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import okhttp3.*;
import java.io.*;
import java.net.*;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Main
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
final static String API_KEY = "***********************************";
// Direct URLs of PDF files to merge
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
final static String[] SourceFiles = {
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf" };
// Destination PDF file name
final static Path DestinationFile = Paths.get(".\\result.pdf");
public static void main(String[] args) throws IOException
{
// Create HTTP client instance
OkHttpClient webClient = new OkHttpClient();
// Prepare URL for `Merge PDF` API call
String query = "https://api.pdf.co/v1/pdf/merge";
// Make correctly escaped (encoded) URL
URL url = null;
try
{
url = new URI(null, query, null).toURL();
}
catch (URISyntaxException e)
{
e.printStackTrace();
}
// Create JSON payload
String jsonPayload = String.format("{\"name\": \"%s\", \"url\": \"%s\"}",
DestinationFile.getFileName(),
String.join(",", SourceFiles));
// Prepare request body
RequestBody body = RequestBody.create(MediaType.parse("application/json"), jsonPayload);
// Prepare request
Request request = new Request.Builder()
.url(url)
.addHeader("x-api-key", API_KEY) // (!) Set API Key
.addHeader("Content-Type", "application/json")
.post(body)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
if (response.code() == 200)
{
// Parse JSON response
JsonObject json = new JsonParser().parse(response.body().string()).getAsJsonObject();
boolean error = json.get("error").getAsBoolean();
if (!error)
{
// Get URL of generated PDF file
String resultFileUrl = json.get("url").getAsString();
// Download PDF file
downloadFile(webClient, resultFileUrl, DestinationFile.toFile());
System.out.printf("Generated PDF file saved as \"%s\" file.", DestinationFile.toString());
}
else
{
// Display service reported error
System.out.println(json.get("message").getAsString());
}
}
else
{
// Display request error
System.out.println(response.code() + " " + response.message());
}
}
public static void downloadFile(OkHttpClient webClient, String url, File destinationFile) throws IOException
{
// Prepare request
Request request = new Request.Builder()
.url(url)
.build();
// Execute request
Response response = webClient.newCall(request).execute();
byte[] fileBytes = response.body().bytes();
// Save downloaded bytes to file
OutputStream output = new FileOutputStream(destinationFile);
output.write(fileBytes);
output.flush();
output.close();
response.close();
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Cloud API asynchronous "PDF Merging" job example (allows to avoid timeout errors).</title>
</head>
<body>
<?php
// Cloud API asynchronous "PDF Merging" job example.
// Allows to avoid timeout errors when processing huge or scanned PDF documents.
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
$apiKey = "****************************************";
// Direct URLs of PDF files to merge. Check another example if you need to upload local files to the cloud.
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/pdfdotco/pdf-co-api-samples/tree/master/File%20Upload/
$sourceFiles = array(
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample1.pdf",
"https://pdfco-test-files.s3.us-west-2.amazonaws.com/pdf-merge/sample2.pdf");
// Prepare URL for `Merge PDF` API call
$url = "https://api.pdf.co/v1/pdf/merge";
// Prepare requests params
$parameters = array();
$parameters["url"] = join(",", $sourceFiles);
$parameters["async"] = true; // (!) Make asynchronous job
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
// URL of generated PDF file that will available after the job completion
$resultFileUrl = $json["url"];
// Asynchronous job ID
$jobId = $json["jobId"];
// Check the job status in a loop
do
{
$status = CheckJobStatus($jobId, $apiKey); // Possible statuses: "working", "failed", "aborted", "success".
// Display timestamp and status (for demo purposes)
echo "<p>" . date(DATE_RFC2822) . ": " . $status . "</p>";
if ($status == "success")
{
// Display link to the file with conversion results
echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>";
break;
}
else if ($status == "working")
{
// Pause for a few seconds
sleep(3);
}
else
{
echo $status . "<br/>";
break;
}
}
while (true);
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
function CheckJobStatus($jobId, $apiKey)
{
$status = null;
// Create URL
$url = "https://api.pdf.co/v1/job/check";
// Prepare requests params
$parameters = array();
$parameters["jobid"] = $jobId;
// Create Json payload
$data = json_encode($parameters);
// Create request
$curl = curl_init();
curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json"));
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
// Execute request
$result = curl_exec($curl);
if (curl_errno($curl) == 0)
{
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($status_code == 200)
{
$json = json_decode($result, true);
if (!isset($json["error"]) || $json["error"] == false)
{
$status = $json["status"];
}
else
{
// Display service reported error
echo "<p>Error: " . $json["message"] . "</p>";
}
}
else
{
// Display request error
echo "<p>Status code: " . $status_code . "</p>";
echo "<p>" . $result . "</p>";
}
}
else
{
// Display CURL error
echo "Error: " . curl_error($curl);
}
// Cleanup
curl_close($curl);
return $status;
}
?>
</body>
</html>
{
"pageCount": 2,
"error": false,
"status": 200,
"duration": 356,
"url": "https://pdf-temp-files.s3.us-west-2.amazonaws.com/example/result.pdf",
"name": "result.pdf",
"outputLinkValidTill": "2026-09-30T12:50:42.443680+00:00",
"credits": 4,
"remainingCredits": 87119
}
{
"error": true,
"status": 400,
"message": "Bad request. Typically due to bad input parameters or unreachable input URLs (e.g., access restrictions like login or password)."
}
{
"status": "error",
"errorCode": 401,
"error": true,
"message": "Please provide your API key as \"x-api-key\" header parameter for GET or POST request or as username (\"curl -u <apikey>\") or as url parameter (not recommended). Get your API key at https://app.pdf.co/account"
}
{
"status": "error",
"errorCode": 402,
"error": true,
"message": "Not enough credits, subscription expired or metered use is not allowed. Please review credits on your account at https://app.pdf.co/subscriptions"
}
{
"error": true,
"status": 403,
"message": "Access forbidden for input URL."
}
{
"error": true,
"status": 404,
"message": "The requested resource could not be found."
}
{
"error": true,
"status": 408,
"message": "The server timed out waiting for the request."
}
{
"error": true,
"message": "Too many requests. Your current limit is <limit> requests per minute. Please try again later"
}
{
"error": true,
"status": 441,
"message": "Invalid Password. Password protected document."
}
{
"error": true,
"status": 442,
"message": "Input document is damaged or of incorrect type."
}
{
"error": true,
"status": 443,
"message": "Permissions. The operation is prohibited by document security settings."
}
{
"error": true,
"status": 444,
"message": "Profiles parsing error. Please ensure that the configuration is supported."
}
{
"error": true,
"status": 445,
"message": "Timeout error. For large documents, use asynchronous mode (async=true) and check status via /job/check."
}
{
"error": true,
"status": 446,
"message": "Some files required for conversion are missing."
}
{
"error": true,
"status": 452,
"message": "Invalid URL."
}
{
"error": true,
"status": 454,
"message": "Invalid parameters."
}
{
"error": true,
"status": 500,
"message": "Something went wrong. Please try again or contact support."
}
Try it live: Merge PDF → API Tester — send a real request from your browser.
POST /v1/pdf/merge
The total combined size of all input file URLs must not exceed 2 GB. Requests that exceed this limit will not be processed.
Request body
Attributes are case-sensitive and should be inside JSON for POST request. for example:
{ "url": "https://example.com/file1.pdf" } No query parameters accepted.To see the request size limits, please refer to the Request Size Limits.
string
required
URLs to the source file
url attribute. If you use multiple URLs, please separate them with a ,string
The callback URL (or Webhook) used to receive the POST data. see Webhooks & Callbacks. This is only applicable when
async is set to true.string
HTTP auth user name if required to access source URL.
string
HTTP auth password if required to access source URL.
boolean
default:"false"
Set
async to true for long processes to run in the background, API will then return a jobId which you can use with the Background Job Check endpoint. Also see Webhooks & Callbacksstring
File name for the generated output, the input must be in string format.
integer
default:"60"
Set the expiration time for the output link in minutes. After this specified duration, any generated output file(s) will be automatically deleted from PDF.co Temporary Files Storage. The maximum duration for link expiration varies based on your current subscription plan. To store permanent input files (e.g. re-usable images, pdf templates, documents) consider using PDF.co Built-In Files Storage.
Show profiles properties
Show profiles properties
| Setting | Type | Description |
|---|---|---|
outputDataFormat | string | If you require your output as base64 format, set this to base64 |
RenameMatchingFieldsDuringMerge | boolean (default true) | This feature enables the renaming of field names during the merging of PDF files which contain forms. If set to false, it will retain the original field names. This is helpful for merged PDF forms with identical field names when the customer wants to auto-fill the identical field names in other pages. |
GenerateBookmarks | boolean (default false) | This adds bookmarks to the merged document with names assigned to every merged document in the same order: |
zipIncludeFilter | string | You can control which files to include and exclude from input zip files with a profiles. |
zipExcludeFilter | string | zipIncludeFilter and zipExcludeFilter support * and ? wildcards. |
MergedDocumentTitle | string (default Title of the first document) | Specifies a custom title for the merged document. Overrides the title of the first document during the merge process. |
DataEncryptionAlgorithm | string | Controls the encryption algorithm used for data encryption. See User-Controlled Encryption for more information. The available algorithms are: AES128, AES192, AES256. |
DataEncryptionKey | string | Controls the encryption key used for data encryption. See User-Controlled Encryption for more information. |
DataEncryptionIV | string | Controls the encryption IV used for data encryption. See User-Controlled Encryption for more information. |
DataDecryptionAlgorithm | string | Controls the decryption algorithm used for data decryption. See User-Controlled Encryption for more information. The available algorithms are: AES128, AES192, AES256. |
DataDecryptionKey | string | Controls the decryption key used for data decryption. See User-Controlled Encryption for more information. |
DataDecryptionIV | string | Controls the decryption IV used for data decryption. See User-Controlled Encryption for more information. |
Rename Matching Fields
This feature enables the renaming of field names during the merging of PDF files which contain forms. If set tofalse, it will retain the original field names. This is helpful for merged PDF forms with identical field names when the customer wants to auto-fill the identical field names in other pages.
{
"profiles": "{ 'RenameMatchingFieldsDuringMerge': false }"
}
Generate Bookmarks
This adds bookmarks to the merged document with names assigned to every merged document in the same order:{
"profiles": "{'GenerateBookmarks': true, 'BookmarkTitles': [ 'BookmarkName1', 'BookmarkName2', 'BookmarkName3' ] }"
}
Include / Exclude from ZIPS
You can control which files to include and exclude from input zip files with aprofiles.
// include PDF, XLS and XLSX files
{
"profiles": "{ 'zipIncludeFilter': '*.pdf,*.xls*' }"
}
// exclude DOC, DOCX, XLS and XLSX files
{
"profiles": "{ 'zipExcludeFilter': '*.doc*,*.xls*' }"
}
zipIncludeFilter and zipExcludeFilter support * and ? wildcards.Change Document Title
You can change the document title during a merge with the following:{
"profiles": "{ 'MergedDocumentTitle': 'New Title' }"
}
Responses
Synchronous response
{
"pageCount": 2,
"error": false,
"status": 200,
"duration": 356,
"url": "https://pdf-temp-files.s3.us-west-2.amazonaws.com/example/result.pdf",
"name": "result.pdf",
"outputLinkValidTill": "2026-09-30T12:50:42.443680+00:00",
"credits": 4,
"remainingCredits": 87119
}
| Field | Type | Description |
|---|---|---|
url | string | Direct URL to the final PDF file stored in S3. |
outputLinkValidTill | string | Timestamp indicating when the output link will expire |
pageCount | integer | Number of pages in the PDF document. |
error | boolean | Indicates whether an error occurred (false means success) |
status | integer or string | The numeric status code of the operation, or the string "error"; when it is "error", the numeric code is in errorCode. The 429 rate-limit response has no status field. In all cases, rely on the HTTP status code of the response. |
name | string | Name of the output file |
credits | integer | Number of credits consumed by the request |
remainingCredits | integer | Number of credits remaining in the account |
duration | integer | Time taken for the operation in milliseconds |
jobId | string | Present in the initial response when async is true. |
jobId and a reserved URL that should be used only after the job succeeds. Poll it via Background Job Check. Error response bodies vary. See the response examples and Response Codes.
Inconsistent URL Encoding in cURL Output: When using cURL to make API requests, the output JSON may show URL characters encoded as Unicode escape sequences. For example, the ampersand character (
&) may appear as \u0026 in the cURL output. This is normal JSON encoding behavior and does not affect the validity of the URL. The URL will function correctly when used, as JSON parsers automatically decode these escape sequences. If you’re parsing the response programmatically, your JSON parser will handle this conversion automatically.Was this page helpful?