Free JSON Formatter & Validator

What is a JSON Formatter?

A JSON formatter (also called a JSON beautifier or JSON pretty printer) takes unformatted or minified JSON data and formats it with proper indentation and line breaks, making it easy to read and debug. JSON (JavaScript Object Notation) is the most common data format used in web APIs, configuration files, and data exchange. Our free online JSON formatter also validates your JSON for syntax errors and can minify formatted JSON to reduce file size. Everything runs locally in your browser — your data is never sent to any server.

How to Format JSON

1. Paste your JSON into the left input panel (or click "Sample" for an example).
2. Click "Format" to beautify with indentation, or "Minify" to compress.
3. Choose between 2-space or 4-space indentation.
4. Check the status indicator — green means valid JSON, red means there's a syntax error.
5. Click "Copy" to copy the formatted result to your clipboard.

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