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JSON Formatter

Format, validate and minify JSON with clear error messages.

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Private by design: your files are processed inside your browser and are never uploaded to our server.

About JSON Formatter

Pretty-print API responses, find the exact line of a JSON error and minify JSON for production.

How to use JSON Formatter

  1. Step 1Enter your values or text in the tool above.
  2. Step 2The result updates instantly as you type.
  3. Step 3Copy or download the result.

Questions & answers

Why is my JSON invalid?

Common causes are trailing commas, single quotes instead of double quotes and unquoted keys. The error shows the line and column.

Is JSON Formatter free?

Yes. Every tool on this site is free to use, with no signup, no watermark and no daily limit.

Does it work on mobile?

Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.

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