JSON formatter & validator
Paste JSON to pretty-print, minify and validate it — instantly, in your browser. Nothing is uploaded.
JSON
Result
Everything runs in your browser. No upload, no sign-up.
How it works
STEP 1
Paste your JSON
Drop in any JSON — an API response, a config, anything.
STEP 2
Format or minify
Pretty-print it with your indent, or minify it to one line. Errors show instantly.
STEP 3
Copy
Copy the clean result with one click. Everything stays on your device.