Merge PDFs
curl --request POST \
--url https://api.pdfbase.dev/v1/pdfs/merge \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"sources": [
{}
],
"page_ranges": [
{}
],
"output": "<string>",
"compress": "<string>",
"metadata": {}
}
'import requests
url = "https://api.pdfbase.dev/v1/pdfs/merge"
payload = {
"sources": [{}],
"page_ranges": [{}],
"output": "<string>",
"compress": "<string>",
"metadata": {}
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
sources: [{}],
page_ranges: [{}],
output: '<string>',
compress: '<string>',
metadata: {}
})
};
fetch('https://api.pdfbase.dev/v1/pdfs/merge', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.pdfbase.dev/v1/pdfs/merge",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'sources' => [
[
]
],
'page_ranges' => [
[
]
],
'output' => '<string>',
'compress' => '<string>',
'metadata' => [
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.pdfbase.dev/v1/pdfs/merge"
payload := strings.NewReader("{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.pdfbase.dev/v1/pdfs/merge")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.pdfbase.dev/v1/pdfs/merge")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}"
response = http.request(request)
puts response.read_bodyEdit
Merge PDFs
Combine multiple PDFs into a single document.
POST
/
v1
/
pdfs
/
merge
Merge PDFs
curl --request POST \
--url https://api.pdfbase.dev/v1/pdfs/merge \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"sources": [
{}
],
"page_ranges": [
{}
],
"output": "<string>",
"compress": "<string>",
"metadata": {}
}
'import requests
url = "https://api.pdfbase.dev/v1/pdfs/merge"
payload = {
"sources": [{}],
"page_ranges": [{}],
"output": "<string>",
"compress": "<string>",
"metadata": {}
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
sources: [{}],
page_ranges: [{}],
output: '<string>',
compress: '<string>',
metadata: {}
})
};
fetch('https://api.pdfbase.dev/v1/pdfs/merge', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.pdfbase.dev/v1/pdfs/merge",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'sources' => [
[
]
],
'page_ranges' => [
[
]
],
'output' => '<string>',
'compress' => '<string>',
'metadata' => [
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.pdfbase.dev/v1/pdfs/merge"
payload := strings.NewReader("{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.pdfbase.dev/v1/pdfs/merge")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.pdfbase.dev/v1/pdfs/merge")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"sources\": [\n {}\n ],\n \"page_ranges\": [\n {}\n ],\n \"output\": \"<string>\",\n \"compress\": \"<string>\",\n \"metadata\": {}\n}"
response = http.request(request)
puts response.read_bodyPhase
Phase 2 — Ships after launch, only if there’s customer demand.Request
array
required
Ordered list of PDFs to merge. Each source can be:
- A PDFBase PDF ID:
{ "pdf_id": "pdf_abc123" } - A URL to a PDF:
{ "url": "https://example.com/doc.pdf" } - A base64-encoded PDF:
{ "base64": "JVBERi0x..." }
array
Optional per-source page selection. Same length as
sources. Each entry is a string like "1-3,5,8-10" or null for all pages.string
default:"url"
url or base64.string
default:"none"
Compression for the merged output.
object
Metadata for the merged PDF.
Response
{
"id": "pdf_merged1",
"object": "pdf",
"status": "completed",
"url": "https://files.pdfbase.dev/pdf_merged1.pdf?token=sig_abc",
"pages": 15,
"bytes": 890000,
"source_count": 3,
"created_at": "2026-05-19T12:00:00Z",
"expires_at": "2026-05-20T12:00:00Z",
"render_time_ms": 420
}
Example
curl -X POST https://api.pdfbase.dev/v1/pdfs/merge \
-H "Authorization: Bearer pk_live_xxx" \
-H "Content-Type: application/json" \
-d '{
"sources": [
{ "pdf_id": "pdf_cover" },
{ "pdf_id": "pdf_report" },
{ "url": "https://legal.example.com/terms.pdf" }
],
"page_ranges": [null, "1-5", null],
"compress": "medium",
"output": "url"
}'