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Free Online Developer Tools
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JSON Formatter & Validator
Format, validate, and minify JSON data with syntax highlighting and error detection.
Try it freeBase64 Encoder/Decoder
Encode and decode Base64 strings and files. Supports text and binary data.
Try it freeURL Encoder/Decoder
Encode and decode URLs and query parameters. Component and full URL modes.
Try it freeJWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and expiration status.
Try it freeAPI Tester
Send HTTP requests from your browser. Test CORS-enabled APIs with GET, POST, PUT, DELETE.
Try it freeHTTP Headers Reference
Browse and search 50+ HTTP headers with descriptions, examples, and RFC links.
Try it freeNeed More Powerful API Tools?
Download RestForge for full API testing, pre-request scripts, environment variables, cloud sync, and more.