Free Developer Tools
Fast, privacy-first interactive tools for developers. No signup, no tracking. Just tools that work.
JWT Decoder
Decode JWT tokens — inspect header, payload, and claims. Check expiry and iat/sub/iss fields instantly.
HTTP Status Codes
Complete reference for all HTTP status codes with descriptions, use cases, and searchable index.
CORS Tester
Test CORS headers for any URL. Analyze preflight responses and diagnose cross-origin errors.
UUID Generator
Generate UUID v4 in bulk. Multiple formats: standard, uppercase, no-hyphens, braces.
API Request Builder
Build and test HTTP requests visually. Generate cURL commands.
JSON Diff Viewer
Compare two JSON objects side-by-side. Highlight added, removed, and unchanged lines instantly.
Regex Tester
Test your regex against multiple strings with pass/fail assertions. Batch validate patterns.
Regex Playground
Write, test, and debug regular expressions in real-time with match highlighting.
Cron Expression Generator
Generate and validate cron expressions with a visual interface.
Git Command Builder
Build complex Git commands step by step with all common options.
Docker Compose Generator
Generate docker-compose.yml configurations visually with templates.
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