JSON Formatter & Validator
Paste your JSON to format and validate it instantly. Beautify with 2 or 4 spaces, or minify it — everything runs in your browser, so your data never leaves your device.
🔒 Tout se passe dans ton navigateur — rien n'est envoyé ni stocké.
Questions fréquentes
- How do I format JSON?
- Paste your JSON in the box and click Format. It's parsed, validated and re-indented for you. If the JSON is invalid, you'll see the exact error message.
- Can I minify JSON too?
- Yes. Click Minify to strip all whitespace and produce the smallest valid JSON, ready to copy.
- Is my JSON uploaded anywhere?
- No. Formatting and validation run entirely in your browser, so your data is never sent to a server — safe for private or production payloads.