格式化、验证、压缩JSON数据，支持语法高亮和错误定位
JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. This free online JSON formatter beautifies messy JSON, validates syntax with detailed error messages, and compresses JSON for production use. Whether you're debugging an API response, preparing configuration files, or validating data structures, this tool handles it all with syntax highlighting and real-time error detection — entirely in your browser with zero data transmission.
Paste or type your JSON into the left panel, then click "Format" to beautify, "Compress" to minify, or "Validate" to check for errors. The formatted result appears instantly in the right panel with syntax highlighting.
JSON Formatter is a free online tool that formats, validates, and compresses JSON data. It helps developers quickly beautify messy JSON, identify syntax errors, and minify JSON for production use.
Yes, completely safe. All JSON processing happens locally in your browser. No data is ever sent to any server, ensuring 100% privacy.
It supports four operations: Format (beautify with indentation), Compress (minify), Validate (check syntax), and Search & Replace. You can choose 2-space, 4-space, or Tab indentation.