Free File Conversion API - Convert Documents, Images & More in 2026

Compare the best free file conversion APIs: CloudConvert, Zamzar, ConvertAPI, PDF.co. Convert PDFs, images, documents, and videos via REST API.

What is Free File Conversion API?

Free File Conversion API is a RESTful API service that lets you integrate file conversion api capabilities directly into your applications. Whether you're building a web app, mobile app, or automated workflow, our API makes it simple.

Key Features

• Compare the best free file conversion APIs: CloudConvert, Zamzar, ConvertAPI, PDF.co
• RESTful JSON API - works with any programming language
• Free tier: 100 requests/day, no credit card required
• Pro tier: 10,000 requests/day for high-volume applications
• Fast response times (avg <200ms)

Pricing

Plan	Requests/Day	Rate Limit	Price
Free	100	10/min	$0/mo
Pro	10,000	100/min	$9.99/mo
Enterprise	Unlimited	Custom	Contact us

Use Cases

• Web Applications: Integrate directly into your frontend or backend
• Mobile Apps: Add file conversion api features to iOS/Android apps
• Automation: Use in Zapier, Make, n8n, or custom workflows
• Internal Tools: Build company tools that leverage our API

Why Choose Our Free File Conversion API?

• No vendor lock-in: Standard REST API, easy to switch
• Generous free tier: 100 requests/day for testing and small projects
• Fast & reliable: Hosted on dedicated infrastructure with 99.9% uptime
• Developer-friendly: Clear documentation, code examples, and playground

Quick Start

Get your free API key and start making requests in minutes.

curl "http://147.224.212.116/api/..." \
  -H "X-API-Key: YOUR_API_KEY"