json formatter

JSON Formatter and Validator

Format, validate and beautify JSON with clear indentation.

Runs locally in your browser No uploads Instant results

Instant results

JSON Formatter

Runs in your browserInput type: JSONOutput type: JSON
Examples
Options
Ready to convert

Practical use

When to use JSON Formatter

This developer utility is designed for quick inspection, formatting and cleanup while working with code, API responses or technical content. JSON Formatter runs locally in the browser, so you can test real input, copy the result or download a file without uploading data to a server.

  • Pretty print
  • Validation
  • Clean output

Example

Compact JSON

The JSON Formatter example shows the input shape this tool expects. Load it with the sample button, change values and immediately see how the output changes.

{"name":"Dana","items":[1,2,3]}

How to use this converter

How to use this converter

  1. Paste JSON.
  2. Convert to format it.
  3. Fix any validation error shown by the tool.

FAQ

FAQ

What input does JSON Formatter expect?

JSON Formatter expects JSON input and returns JSON output. Start with the sample if you are unsure about the expected structure.

Why did JSON Formatter show an error?

Errors usually mean the input is empty, incomplete or not valid JSON. Check brackets, quotes, separators and special characters before converting again.

Is my data uploaded to a server?

No. The conversion runs in your browser, so your input does not need to leave your device.

Can I use this converter for free?

Yes. The tools are free to use, with simple advertising that helps keep the site available.

Before converting

How to get a cleaner result

  • For developer tools, validate the result before using it in production code or API requests.
  • Try the built-in sample first to understand the expected input shape.
  • Check that the input is complete before copying or downloading the output.
  • If an error appears, reduce the input to a smaller section and test again.

Common issues

What to check if something fails

  • Syntax errors usually come from missing brackets, quotes or separators.
  • Formatted output should still be validated before use.
  • Sensitive code or tokens should not be shared in screenshots.

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