JSON Formatter & Validator

JSON formatting (also called beautifying or pretty-printing) is the process of adding proper indentation, line breaks, and spacing to JSON data to make it human-readable. This tool automatically formats your JSON with customizable indentation.

Simply paste your JSON into the input area. The tool validates it in real-time, showing a green indicator for valid JSON and a red indicator with error details (including line and column) for invalid JSON.

Formatting adds whitespace and indentation for readability. Minifying removes all unnecessary whitespace to reduce file size, which is useful for production environments and API responses.

Yes! All processing happens entirely in your browser. Your JSON data is never sent to any server. No data is collected, stored, or transmitted.

This tool supports standard JSON as defined by RFC 8259 and ECMA-404. It handles all valid JSON data types including objects, arrays, strings, numbers, booleans, and null values.