JSON Tools That Just Work
Format, validate, convert and visualize JSON instantly — right in your browser. Fast, private, free. No signup. No nonsense.
All Tools
Six powerful JSON utilities — all free, all instant, all private.
JSON Formatter
Beautify and minify JSON with syntax highlighting. Instant, clean output.
JSON Validator
Validate JSON syntax and get precise error locations. Never ship broken JSON again.
CSV → JSON
Convert CSV files to JSON arrays instantly. Supports file upload up to 2MB.
JSON → CSV
Export flat JSON arrays as downloadable CSV spreadsheets.
JSON Tree Viewer
Visualize deeply nested JSON as an interactive, collapsible tree.
JSON → TypeScript
Auto-generate TypeScript interfaces from any JSON object. Save hours of typing.
Lightning Fast
All processing happens in your browser. No network delay, no server roundtrip.
100% Private
Your data never leaves your device. No login, no tracking, no storage.
Mobile Friendly
Fully responsive design. Use it on any device, anytime.
Built by a developer, for developers.
Part of the CodeSmash ecosystem — one platform for every coding need.