JSON Formatter
Format, validate and minify JSON in your browser. Paste it in, tidy it up, and copy it back — nothing is uploaded.
How to use
- Paste or type your JSON into the box.
- Choose your indentation, then press Format to tidy it up — or Minify to pack it tight.
- Copy the result to your clipboard, or download it as a .json file.
FAQ
Is my data sent anywhere?
No. Formatting, validating and minifying all happen entirely in your browser. Your JSON is never uploaded to a server, so it works offline and stays private — safe even for sensitive data.
Why am I getting an “invalid JSON” message?
JSON is strict. The most common causes are trailing commas, single quotes instead of double quotes, unquoted keys, or a missing bracket. We point you to the line and column where it first breaks so it’s quick to fix.
What’s the difference between Format and Minify?
Format adds indentation and line breaks so JSON is easy to read. Minify strips all of that out to make the smallest possible string — handy for sending data to an API or embedding it in code.