What is JSON formatting?

JSON formatting (beautifying) adds proper indentation and line breaks to compact or minified JSON, making it human-readable. Minifying does the reverse — removing all whitespace to reduce file size.

How do I fix a JSON syntax error?

Our validator shows the exact error message from the JSON parser, including the position of the error. Common issues include missing commas, unclosed brackets, or unquoted keys.

Can I use this for large JSON files?

Yes. The tool handles large JSON files efficiently since all processing runs in your browser with no server round-trips or size limits.

What indentation options are available?

You can choose between 2 spaces, 4 spaces, or 1 space indentation to match your codebase conventions.

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JSON Formatter & Validator

Format, validate, and minify JSON free. Beautify messy JSON instantly, spot syntax errors, and copy clean output. Works offline in browser.

About this tool

Format and validate JSON instantly in your browser. Paste your raw JSON to beautify it with proper indentation, minify it for production, or validate syntax with clear error messages. A must-have tool for developers working with APIs, config files, and data.

Indent:

Input

Output