JSON Formatter

Format, validate, and minify JSON with clear error details.

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Result
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Next steps

How to format and validate JSON

Use the JSON Formatter to turn compact or irregular JSON into readable output, validate its syntax, or minify it for transport and storage.

Steps

  1. 1Paste a JSON object or array into the input editor.
  2. 2Choose two or four spaces, then select Format & Validate or Minify.
  3. 3Review the highlighted output, copy it, or continue to a related workflow.

JSON checks and output

  • Reports parse errors caused by missing brackets, trailing commas, or invalid quotes.
  • Calculates field count, nesting depth, arrays, and output size.
  • Highlights potentially sensitive keys before you copy formatted data.

Processed locally

JSON input and formatted output stay in this browser tab. Devutilio does not upload or persist the content.