JSON Formatter
Format, beautify and validate your JSON. Supports minify and prettify.
How to use
- 1Paste your JSON into the left input area
- 2Choose mode: Prettify or Minify
- 3Click "Process" to see the result on the right
- 4Click "Copy" to copy the result to clipboard
Frequently Asked Questions — JSON Formatter
What is JSON formatting?+
JSON formatting (pretty-printing) adds indentation and line breaks to compact JSON so it is easy for humans to read and debug. It does not change the data.
Is my JSON data safe?+
Yes. All formatting happens entirely in your browser using JavaScript. No data is sent to any server.
What is the difference between Format and Validate?+
Formatting makes JSON readable; validating checks whether the JSON is syntactically correct. This tool does both automatically.
Can I format minified JSON?+
Yes. Paste any compact, single-line JSON and the tool will expand it into a readable multi-line format.
What causes "Unexpected token" errors?+
Common causes: trailing commas (not allowed in JSON), single quotes instead of double quotes, unquoted keys, or JavaScript-style comments.
What is the maximum JSON size supported?+
As a browser-based tool there is no hard server limit; however, very large files (>10 MB) may slow down depending on your device.
Can I use this to format JSON APIs?+
Yes. Paste the raw API response and get a formatted, readable version. Great for debugging REST APIs and GraphQL responses.