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Developer Tools

72 tools

Developer Tools – Format, convert, validate and generate code on the fly.

Format, convert, and decode payloads instantly in your browser — your tokens and source code never leave your machine. A full developer toolbox in your browser — JSON, CSV, XML, YAML, TOML formatters and converters; regex testers; JWT and UUID generators; base, color, and timestamp converters; HTML, CSS, JS minifiers and beautifiers; cron parsers; and dozens more. Every utility runs entirely client-side, so payloads, tokens, and source code never leave your machine. Skip context-switching to half a dozen websites and grab the exact tool you need — pretty-print a noisy API response, validate a JWT, generate test data, build a GraphQL query, or convert a curl command into Python. Designed for working engineers who want zero friction: paste, run, copy, and back to your editor.

Which developer tools tool should I pick?

  • Pretty-print an unreadable API response
    JSON Formatter
    Indentation, syntax highlighting, and validation in one paste.
  • Build a TypeScript interface from JSON
    JSON to TypeScript
    Generates accurate type definitions from any JSON sample.
  • Inspect a JWT token safely
    JWT Decoder
    Decoding happens locally — your token isn't sent anywhere.
  • Test a regex against sample data
    Regex Tester
    Live match highlighting with capture-group breakdown.

Frequently asked questions

Are these developer tools really free?

Yes — every developer tool on iwanttools is 100% free with no signup, no trials, and no usage limits. We don't charge for any feature.

Do these developer tools work offline or in private?

Every tool runs entirely in your browser using JavaScript. Once the page loads, your input never leaves your device — no server upload, no tracking, no logging.

Which developer tool should I use for a JSON payload from an API?

Use the comparison table above to pick the right tool for your scenario. The "Best tools for…" section also groups tools by common goals so you can jump straight to what fits.

Do I need to install anything?

No installation, no extension, no account. Open the tool page, use it, and close the tab — that's the entire workflow.

Can I use these tools on mobile?

Yes, every tool is mobile-optimized with large tap targets, a 16px input minimum to prevent iOS zoom, and a layout that adapts to phone screens.