Does this tool upload my JSON data?

No. All processing happens locally in your browser. Your JSON data never leaves your device.

Is there a file size limit?

The tool can handle JSON files up to 10MB. For larger files, consider using our API.

Does the validator check for trailing commas?

Yes, our JSON validator strictly follows standard JSON syntax rules, which means trailing commas will be flagged as syntax errors.

Can I format minified JSON back to readable format?

Absolutely. You can paste any valid minified JSON into the input box and click 'Format / Beautify' to instantly restore proper indentation.

JSON Formatter & Validator

Format, validate, minify, and beautify JSON instantly in your browser. Free, fast, and secure.

Configuration Panel

lock Processing Locally

JSON Input

Result

info

About JSON Formatter

Our JSON Formatter is a free, client-side tool that helps you format, validate, and minify JSON data instantly. No uploads, no server processing—everything happens in your browser for maximum speed and privacy.

Features

check Format and beautify JSON with proper indentation
check Validate JSON syntax instantly
check Minify JSON to reduce file size
check 100% client-side processing

How to Use

Paste or type your JSON in the input box
Click "Format" to beautify or "Minify" to compress
Click "Validate" to check for syntax errors
Copy the result with one click

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