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🧩 JSON Formatter Online — Free

Paste messy JSON and make it neat and readable — or shrink it to one line. Validate it too, with a clear error message when something is wrong.

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JSON input

Output

How to use this tool

Paste your JSON in the box above.
Press Format to beautify it, Minify to shrink it, or Validate to check it.
Use Copy Output to copy the result.

This free JSON formatter takes compact or messy JSON and prints it with clean indentation, so you can read and debug it. The validator tells you exactly where a missing comma or bracket is, instead of a confusing error. Minify does the opposite — it removes all spaces and line breaks, which is useful when you need the smallest possible JSON for an API or a config file.

Frequently asked questions

Is this JSON formatter really free?

Yes — completely free, with no sign-up and no limit on how much JSON you format.

What does Validate do?

Validate checks whether your text is proper JSON and shows the exact error position if it is not — for example a missing quote or comma.

Is my JSON uploaded anywhere?

No. The formatting happens inside your browser — your data never leaves your device.

🔒 Your privacy: this tool runs 100% inside your browser. Your JSON is never uploaded to any server — it stays on your device.

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