JSON Formatter

Free JSON Formatter & Validator

JSON (JavaScript Object Notation) is the backbone of modern web APIs. Our formatter uses the browser's native JSON.parse() and JSON.stringify() — the gold standard — to validate, beautify, or minify your JSON data. It catches every syntax error with clear error messages, helping you debug API responses, configuration files, and data payloads. Zero libraries needed, zero data sent anywhere. Just your browser's built-in JSON engine.