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Supabus
Developer Tools

JSON Formatter

Format, minify, or validate JSON instantly, with clear error messages and optional alphabetical key sorting.

Processed on our servers. Files aren't stored after your result is ready. Privacy Policy

How to use it

  1. Paste your JSON.
  2. Choose format, minify, or validate mode.
  3. For format mode, optionally set the indent width and whether to sort keys.
  4. Get the result instantly, or a clear error message if the JSON is invalid.

About this tool

Format (pretty-print), minify, or validate JSON. Catches syntax errors with a clear message and can optionally sort object keys alphabetically.

Frequently asked questions

What happens if my JSON is invalid?
You'll get a clear error message describing what's wrong, instead of a cryptic parser exception.
Is there a size limit?
Input is capped at about 5MB of text, which comfortably covers virtually all everyday JSON documents/API responses.