API & Networking

Browse our free API & Networking collection for developers. Every tool works in your browser with no installation required.

8 tools
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
Internet Speed Test
Check download speed, latency, jitter, and upload availability from your browser
Mixpanel Toolkit
Local Mixpanel event sandbox
Browser P2P File Transfer
Send files directly between two browsers using WebRTC. No upload, no account, no server storage.
Browser Video Call
Make a direct one-to-one P2P video call with screen sharing and private browser-to-browser chat.
cURL to Code Converter
Convert HTTP requests across cURL, code, HAR, and structured formats with local secret protection.

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CodingTool is officially live on

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