JSON Formatter & Validator

Paste your raw JSON into the input area and the tool instantly pretty-prints it with proper indentation and line breaks. You can choose 2-space, 4-space, or tab indentation to match your project style. The formatted output is ready to copy with one click.

The tool parses your JSON in real time and reports syntax errors with the exact line and column number. Common issues it catches include missing commas, unquoted keys, trailing commas, and mismatched brackets. A green or red status indicator gives you instant feedback.

Minified JSON removes all whitespace and line breaks, reducing file size for production API responses, config files, and network payloads. Use formatting during development for readability, and minification when you need the smallest possible payload.

Absolutely. All formatting, validation, and minification happen entirely in your browser using client-side JavaScript. Your JSON data is never uploaded to any server, making it safe for sensitive configuration files and API payloads.

This formatter fully supports the JSON specification defined by RFC 8259 and ECMA-404. It handles nested objects, arrays, strings, numbers, booleans, and null values at any depth. It works with API responses, package.json files, and any valid JSON document.