JSON Formatter & Validator
Pretty-print, minify and validate JSON with precise error locations.
Files never leave your device Instant results 100% free No sign-up
How to use the JSON Formatter & Validator
- Paste your input or type directly in the editor.
- Pick the operation — results appear in real time.
- Copy the output to your clipboard or download it.
Private & secure
Processing happens locally with JavaScript, Canvas and Web APIs.
No uploads, no storage, no account. Close the tab and it is gone.
Works on desktop and mobile in any modern browser.