API Documentation

Welcome to the PDFjin API. Our powerful, high-performance API allows you to automate PDF workflows with just a few lines of code. Everything you can do on our website is available via our REST API.

# Check if the API is online
curl https://pdfjin-api-pdgjin-uc.a.run.app/

Authentication

For the Developer plan, include your secret API key in the Authorization header as a Bearer token.

Authorization: Bearer pdfjin_dev_secret_key_2026

Base URL

All API requests should be made to our primary endpoint:

POST Merge PDF

Combine multiple PDF files into a single document.

Request Parameters

curl -X POST "https://pdfjin-api-pdgjin-uc.a.run.app/merge-pdf" \
  -F "files=@document1.pdf" \
  -F "files=@document2.pdf" \
  --output merged.pdf

POST PDF to Excel

Extract tabular data from PDF files directly into Excel format (.xlsx).

curl -X POST "https://pdfjin-api-pdgjin-uc.a.run.app/pdf-to-excel" \
  -F "files=@report.pdf" \
  --output data.xlsx

POST Edit & Sign PDF

Programmatically add text, shapes, or signature images to any page.

Form Data

[
  {
    "type": "image",
    "page": 0,
    "x": 400,
    "y": 600,
    "width": 150,
    "height": 50,
    "image": "data:image/png;base64,iVBORw0KG..."
  },
  {
    "type": "text",
    "page": 0,
    "x": 100,
    "y": 100,
    "text": "Signed via PDFjin",
    "size": 12,
    "color": "#6c63ff"
  }
]

POST Protect PDF

Encrypt a PDF with a user/owner password.

Form Data