JSON Formatter - Beautify JSON Online

Format and beautify JSON with proper indentation. Free online JSON formatter works in your browser. No uploads, preserves your data privacy.

Frequently Asked Questions

This tool takes minified or poorly formatted JSON and adds proper indentation, line breaks, and spacing to make it readable. Perfect for debugging API responses or understanding complex data structures.

Yes. All formatting happens entirely in your browser using JavaScript. No data is uploaded to any server, and no network requests are made.

You can choose between 2 spaces, 4 spaces, or tab indentation to match your preferred coding style.

No. This is a formatter, not a fixer. If your JSON has syntax errors, use our JSON Validator to identify and fix the issues first.

Since processing happens in your browser, the limit depends on your device's memory. Most browsers handle several megabytes without issues.

This tool formats standard JSON only. JSONP (with callback functions) and JSON5 (with comments and trailing commas) aren't supported.

Yes. Both JSON objects ({}) and arrays ([]) are fully supported. The formatter handles nested structures at any depth.

All Unicode characters, escape sequences, and special characters in strings are preserved exactly as they appear in the original.

No. Numbers, strings, booleans, null, objects, and arrays all maintain their original types and values after formatting.

Yes. Perfect for prettifying API responses during development, making them easier to read and debug without external tools.