Free browser tool

JSON Formatter & Validator

Paste JSON to format it for readability, minify it for compact output, validate syntax, and copy the processed result. Everything runs client-side in your browser.

JSON tool

Paste JSON, then format, minify, validate, or copy the processed result.

How to use this JSON formatter

  1. Paste your JSON into the input textarea.
  2. Choose Format JSON, Minify JSON, or Validate JSON.
  3. Review the result or error message, then copy the output.

FAQ

Is this JSON formatter free?

Yes. The JSON formatter is free to use and does not require an account.

Does this tool upload my JSON?

No. Formatting, validation, minification, and copying happen in your browser.

Can I minify JSON with this tool?

Yes. Use the Minify JSON button to remove whitespace and create compact JSON output.

What happens when JSON is invalid?

The tool shows a clear error message so you can find and fix the syntax issue.