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JSON Formatter & Validator

Format, validate and minify JSON data online. Free JSON beautifier with syntax highlighting.

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What is JSON Formatter?

JSON Formatter is a free online tool that beautifies and validates JSON data. It takes minified or unformatted JSON and adds proper indentation, making it easy to read and debug.

Features

  • Format JSON with 2-space indentation
  • Minify JSON by removing whitespace
  • Validate JSON syntax with error messages
  • Copy formatted output to clipboard
  • 100% client-side — your data never leaves your browser

When to use JSON Formatter

Use this tool when working with APIs, debugging JSON responses, cleaning up config files, or preparing JSON data for documentation. It's especially useful when you receive minified JSON from an API and need to inspect the structure.