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TRULLZ

Free JSON Formatter

Pretty-print, minify and validate JSON.

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How to use the JSON Formatter

  1. 1Paste JSON into the editor.
  2. 2Click Format (2/4 spaces) or Minify.
  3. 3Errors show exact line and column.

Features

  • 2/4-space/tab indent
  • Precise error positions
  • One-click copy
  • Auto-detects minified input

Frequently Asked Questions

Is my JSON sent to a server?

No — parsing happens in your browser.

Does it support JSON5 or comments?

No — standard JSON only. Remove comments before formatting.

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About the JSON Formatter

Format JSON with configurable indentation, minify it, or validate and get precise error positions. The JSON Formatter runs entirely in your browser — your data is processed locally and never uploaded to a server. Explore more Developer tools or browse all free online tools.