API
Browse our free API collection for developers. Every tool works in your browser with no installation required.
6 tools available
HTTP Header Parser
Parse HTTP headers
Swagger / OpenAPI Viewer
Visualize and explore OpenAPI 3.x and Swagger 2.0 specs instantly
Mini Postman (API Tester)
Test REST APIs directly in your browser — no install needed
cURL to Code Converter
Convert HTTP requests across cURL, code, HAR, and structured formats with local secret protection.
HAR to Markdown
Compile sanitized network logs for backend debugging and AI agents
HAR to OpenAPI
Generate a reviewable OpenAPI contract from sanitized browser traffic
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About API
Browse our free API collection for developers. Every tool works in your browser with no installation required.All tools are free and require no installation or sign-up. Each page identifies whether processing is local, hybrid, or server-backed. Whether you're debugging, converting data formats, or generating code, these tools help you work faster and smarter.
Why Choose Our Tools?
- Privacy-First: All processing happens in your browser — no data leaves your device.
- Instant Results: Client-side processing means zero server delays.
- No Sign-Up: Start using any tool immediately, no registration required.
- Multilingual: Available in 10 supported languages for developers worldwide.
