JSON Formatter & Validator
Paste your JSON to format, validate, or minify. Everything runs in your browser.
About JSON Formatter
This free JSON formatter lets you pretty-print, validate, and minify JSON data instantly. Everything runs client-side in your browser — your data never leaves your device.
Features: Pretty-print with 2 or 4 space indentation, minify to single line, validate JSON syntax with detailed error messages, copy output with one click.
Frequently Asked Questions
Is this JSON formatter free to use?▼
Yes, this JSON formatter is completely free. You can format, validate, and minify JSON without any signup or account. Free users get 5 operations per day, and Pro users get unlimited access.
Is my JSON data safe?▼
Absolutely. This tool runs 100% in your browser — your JSON data never leaves your device. No data is sent to any server. You can verify this by checking your browser's network tab.
What's the difference between formatting and beautifying JSON?▼
Formatting and beautifying JSON are the same thing — both add indentation and line breaks to make JSON human-readable. This tool supports 2-space and 4-space indentation, as well as tab indentation.
Can I validate JSON with this tool?▼
Yes. The validator checks your JSON for syntax errors and shows detailed error messages with line numbers. It catches missing commas, unmatched brackets, invalid values, and other common JSON mistakes.
What is JSON minification?▼
JSON minification removes all unnecessary whitespace, indentation, and line breaks from JSON data. This reduces file size, which is useful when sending JSON over the network or storing it in databases.
Does this tool work on mobile?▼
Yes. The JSON formatter is fully responsive and works on phones, tablets, and desktops. The interface automatically adapts to your screen size.