JSON Formatter
Free JSON formatter that beautifies, minifies, and validates JSON entirely in your browser. Your data never leaves your device — no uploads, no sign-up.
JSON input
Output
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About this tool
Beautify, validate and minify JSON in your browser. Paste raw JSON to get clean, indented output, or compact it to a single line — with instant error reporting.
Common use cases
- Make API responses readable while debugging
- Minify JSON before shipping it in a payload
- Spot the exact line and column of a syntax error
How to use
- Paste or type your JSON into the input box.
- Choose Beautify for readable, indented output, or Minify to compact it to a single line.
- Invalid JSON is flagged instantly with the exact line and column so you can fix it quickly.
- Copy the result or download it as a .json file — everything stays in your browser.