Free JSON Formatter

What is this JSON formatter?

This free JSON formatter helps you quickly beautify, validate, and minify JSON data. It’s perfect for tidying API responses, editing configuration files, or making logs readable. Paste your JSON, click Format for pretty output with indentation, or Minify to produce a compact single-line string. Everything runs locally in your browser for privacy.

How to use it

1. Paste JSON in the input on the left.
2. Click Format to pretty-print with indentation, or Minify for a compact result.
3. If there’s a syntax issue, you’ll see an inline error—fix and retry.
4. Copy the output or Download it as a .json file.

Tips

• JSON doesn’t allow comments or trailing commas (JSON5 features aren’t supported).
• Use Minify for production payloads to reduce size; use Format for local debugging.
• If you need to preserve number precision, ensure values are strings in your source.

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Privacy: runs entirely in your browser—no data is sent anywhere.