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PDF Tools API

Split PDF API

Extract page ranges or divide large PDFs automatically so your app can produce focused packets, attachments, or archives.

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Credits

1 Credit / call

1 Credit per successful API request. Failed processing attempts are refunded automatically.

Pricing

1,000 Credits = $1

Every signed-in user receives 100 free API Credits each month.

Endpoint

/api/external/pdf-tools/split-pdf

Use your API Key in the x-api-key header.

Use case

Use it in intake pipelines that receive one long PDF and need to route contracts, invoices, exhibits, or attachments as separate files.

cURL example

curl -X POST https://itextmaster.com/api/external/pdf-tools/split-pdf \
  -H 'x-api-key: YOUR_API_KEY' \
  -F 'file=@input.pdf;type=application/pdf' \
  -F 'options={"mode":"ranges","ranges":[{"start":1,"end":3},{"start":4,"end":8}]}' \
  --output split-results.zip

Multipart example

curl -X POST https://itextmaster.com/api/external/pdf-tools/split-pdf \
  -H 'x-api-key: YOUR_API_KEY' \
  -F 'file=@input.pdf;type=application/pdf' \
  -F 'options={"mode":"ranges","ranges":[{"start":1,"end":3},{"start":4,"end":8}]}' \
  --output split-results.zip

JSON base64 example

curl -X POST https://itextmaster.com/api/external/pdf-tools/split-pdf \
  -H 'Content-Type: application/json' \
  -H 'x-api-key: YOUR_API_KEY' \
  -d '{
    "file": { "name": "input.pdf", "dataBase64": "JVBERi0xLjcK..." },
    "options": {"mode":"ranges","ranges":[{"start":1,"end":3},{"start":4,"end":8}]}
  }' \
  --output split-results.zip

Node.js example

import { writeFile } from 'node:fs/promises';

const response = await fetch('https://itextmaster.com/api/external/pdf-tools/split-pdf', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'x-api-key': process.env.ITEXTMASTER_API_KEY
  },
  body: JSON.stringify({
  file: { name: 'input.pdf', dataBase64: 'JVBERi0xLjcK...' },
  options: {"mode":"ranges","ranges":[{"start":1,"end":3},{"start":4,"end":8}]}
})
});

if (!response.ok) {
  throw new Error(await response.text());
}

await writeFile('split-results.zip', Buffer.from(await response.arrayBuffer()));

Python example

import os
import requests

response = requests.post(
    'https://itextmaster.com/api/external/pdf-tools/split-pdf',
    headers={
        'Content-Type': 'application/json',
        'x-api-key': os.environ['ITEXTMASTER_API_KEY'],
    },
    json={
        'file': {'name': 'input.pdf', 'dataBase64': 'JVBERi0xLjcK...'},
        'options': {'mode': 'ranges', 'ranges': [{'start': 1, 'end': 3}, {'start': 4, 'end': 8}]}
    },
)
response.raise_for_status()

with open('split-results.zip', 'wb') as f:
    f.write(response.content)

Error codes

401invalid_api_key

The x-api-key header is missing, invalid, or has been rotated.

402insufficient_credits

The account does not have enough API Credits for the request.

422pdf_tool_processing_failed

The file, options, or PDF structure could not be processed. Failed processing attempts are refunded automatically.

Limits

  • Requires one valid PDF file.
  • Returns ZIP output when one request creates multiple files.
  • Page ranges must refer to pages that exist in the input PDF.

Response headers

split-results.zip with X-Credits-Charged: 1 and X-Credit-Balance response headers.

Content-Type
The MIME type of the generated file, usually application/pdf or application/zip.
Content-Disposition
Attachment filename for the generated output.
X-Credits-Charged
Credits charged for the successful request.
X-Credit-Balance
Remaining API Credit balance after the request.

FAQ

How much does the Split PDF API cost?

Each successful Split PDF API request uses 1 Credit. 1,000 Credits cost $1, and every signed-in user receives 100 free API Credits each month.

What happens if processing fails?

Failed processing attempts are refunded automatically, and the API returns an error response you can log or retry.

Should I call this API from the browser?

No. Keep API Keys server-side and call the endpoint from your backend, queue, or automation job when you need to split pdf.

Start with 100 free API Credits

Create an API Key, test Split PDF API, and buy more Credits only when automation volume grows.

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