Client-side only

JSON Formatter & Beautifier Online

Format, beautify, and validate JSON with syntax highlighting. Supports large files.

Indent:

Input (Raw/Minified JSON)

Formatted Output

Formatted JSON appears here...

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How to Use JSON Formatter

Paste your JSON

Paste raw or minified JSON into the input area.
Click Format

Instantly formats with proper indentation and syntax highlighting.
Copy the result

Click the copy button to copy formatted JSON to clipboard.

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Frequently Asked Questions

What is JSON formatting?

JSON formatting (or beautifying) adds proper indentation, line breaks, and spacing to minified or compressed JSON data, making it human-readable. This tool also validates JSON syntax and highlights errors.

Is my JSON data secure?

Yes. All processing happens entirely in your browser. Your JSON never leaves your device — no data is sent to any server.

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