Free tools

JSON Formatter

Format and prettify minified JSON instantly in your browser — free online JSON beautifier with syntax validation.

JSON Formatter & Prettifier Online

Paste any JSON — minified or messy — into the field above and click Format / Prettify to get nicely indented output. Use Minify to strip all whitespace for compact output. If the JSON is invalid, an error message will tell you exactly what went wrong.

What Is JSON Formatting?

JSON formatting (or prettifying) adds consistent indentation and line breaks to a compact JSON string, making it easy to read and navigate. Minifying does the reverse — it removes all unnecessary whitespace to reduce file size.

Common Uses

  • Reading API responses that are returned as a single line
  • Validating that a JSON string is well-formed before using it
  • Minifying JSON config files to reduce payload size
  • Debugging JSON embedded in logs or environment variables

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Super tools

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