Format, validate and convert JSON. Nothing leaves your browser.
Format, validate, minify and convert JSON in one click. Every tool runs in your browser, so your data stays on your computer.
Pretty-print and validate JSON, with exact error locations.
{…}Strip whitespace to shrink JSON and see the bytes saved.
{ } → ,Flatten JSON arrays into CSV for Excel or Google Sheets.
, → { }Turn CSV with a header row into a typed JSON array.
Invalid JSON shows the exact line and column of the problem, so you can fix API responses and config files without guessing.
JSON to CSV flattens nested objects into dotted columns like address.city, ready for Excel or Google Sheets.
Everything runs in your browser. Your data is never uploaded, logged or stored on a server.