Best PDF & Document APIs in 2026

Browse the top PDF & Document APIs used by developers worldwide.

8 APIs across 5 subcategories

PDF Generation(3)

PaidPDF Generation

PDFMonkey

API for generating PDFs from HTML/CSS templates with dynamic data.

PaidPDF Generation

DocSpring

PDF generation API that fills templates with data and creates documents.

npm i docspring

FreePDF Generation

Gotenberg

Docker-based API for converting HTML, Markdown, and Office docs to PDF.

npm i gotenberg-js-client

PDF Manipulation(1)

FreePDF Manipulation

pdf-lib

JavaScript library for creating and modifying PDFs in Node.js and browsers.

npm i pdf-lib

PDF Processing(2)

PaidPDF Processing

PSPDFKit

Document processing API for viewing, annotating, editing, and signing PDFs.

FreemiumPDF Processing

ILovePDF API

PDF processing API for merging, splitting, compressing, and converting PDFs.

npm i @ilovepdf/ilovepdf-nodejs

E-Signatures(1)

PaidE-Signatures

DocuSign

E-signature and document management API for signing workflows.

npm i docusign-esign

Document Automation(1)

FreemiumDocument Automation

PandaDoc

Document automation API for proposals, quotes, contracts, and e-signatures.

npm i pandadoc-node-client

Browse other API categories

AI & Machine Learning

22 APIs · 8 subcategories

Communication

16 APIs · 6 subcategories

Maps & Geolocation

15 APIs · 7 subcategories

Data & Information

15 APIs · 11 subcategories

Fintech & Banking

14 APIs · 6 subcategories

Payments & Commerce

13 APIs · 6 subcategories

Developer Tools

13 APIs · 10 subcategories

Authentication & Identity

12 APIs · 5 subcategories

Social Media

12 APIs · 7 subcategories

Shipping & Logistics

12 APIs · 6 subcategories

CRM & Marketing

12 APIs · 7 subcategories

Automation & Integration

12 APIs · 6 subcategories

Cloud & Infrastructure

11 APIs · 6 subcategories

Databases & Backend

10 APIs · 6 subcategories

CRM & Sales

10 APIs · 3 subcategories

Analytics & Monitoring

9 APIs · 5 subcategories

Media & Streaming

9 APIs · 6 subcategories

Translation & NLP

8 APIs · 3 subcategories

Calendar & Scheduling

7 APIs · 2 subcategories

Project Management

7 APIs · 3 subcategories

Video & Media

7 APIs · 5 subcategories

Search & Data

6 APIs · 3 subcategories

Content Management

6 APIs · 3 subcategories

Realtime & WebSockets

6 APIs · 5 subcategories

Forms & Surveys

6 APIs · 2 subcategories

KYC & Identity

6 APIs · 1 subcategories

Feature Flags

6 APIs · 2 subcategories

Queue & Messaging

6 APIs · 6 subcategories

Image Processing

6 APIs · 5 subcategories

Vector Databases

6 APIs · 6 subcategories

Customer Support

6 APIs · 3 subcategories

Logging & Observability

6 APIs · 4 subcategories

Subscription & Billing

6 APIs · 3 subcategories

Travel & Hospitality

5 APIs · 4 subcategories

Push Notifications

5 APIs · 3 subcategories

E-Signatures

5 APIs · 2 subcategories

CDN & Edge

5 APIs · 2 subcategories

DNS

5 APIs · 3 subcategories

Secrets Management

5 APIs · 4 subcategories

Tax & Compliance

5 APIs · 4 subcategories

SEO & Web Analytics

5 APIs · 3 subcategories

Blockchain & Crypto

5 APIs · 4 subcategories

HR & Payroll

5 APIs · 4 subcategories

Weather

4 APIs · 2 subcategories

News & Content

4 APIs · 3 subcategories

Security

3 APIs · 3 subcategories