How to format JSON
- Paste your JSON into the top box.
- Click Format to pretty-print it, or Minify to compress it to one line.
- If something's wrong, the exact error is shown. Otherwise, click Copy result.
Format vs minify
Formatting (beautifying) adds indentation and line breaks so JSON is easy to read and debug. Minifying strips all that whitespace to make the file as small as possible — useful for production and APIs.
Is it private and safe?
Yes. Toolyard processes JSON inside your browser on your own device. Your data is never uploaded anywhere — safe for API keys, configs and private payloads.
Frequently asked questions
Why does it say my JSON is invalid?
Common causes are trailing commas, single quotes instead of double quotes, or missing brackets. The error message points to the spot.
Does it sort or change my data?
No — it only reformats whitespace. Keys and values stay exactly as they are.
Is my JSON uploaded?
No. Everything runs on your device and nothing is sent anywhere.
Is it free?
Completely free, no sign-up.