即时格式化、验证、压缩和修复 JSON。纯客户端运行，支持语法高亮和树状视图。
JSON Formatter & Validator is a free online tool that helps developers and data analysts format, validate, minify, and repair JSON data instantly. All processing happens in your browser — no data is ever sent to a server, ensuring complete privacy and security.
JSON (JavaScript Object Notation) is a lightweight data format used for storing and transmitting data. Formatting JSON makes it human-readable with proper indentation and line breaks, which is essential for debugging, reviewing configurations, and sharing data with others.
Yes, absolutely. All processing happens entirely in your browser using JavaScript. Your JSON data is never sent to any server, ensuring complete privacy and security.
Format (Beautify) adds indentation and line breaks to make JSON readable. Minify removes all unnecessary whitespace to produce the most compact JSON possible, which is ideal for production use to reduce file size.
Yes, the Repair mode attempts to fix common JSON issues such as missing quotes, trailing commas, unquoted keys, and incorrect escape sequences. It then formats the repaired JSON for readability.
The Sort Keys option alphabetically sorts all object keys in your JSON. This is useful for creating consistent, diff-friendly JSON outputs, especially when comparing versions of configuration files.
The statistics panel displays: total keys, objects, arrays, strings, numbers, booleans, nulls, and the maximum nesting depth of your JSON structure.
Yes, simply click the Download button and the result will be saved as a .json file with a timestamp in the filename. You can also use the Copy button to copy the result to your clipboard.
Yes, since all processing is done client-side in your browser, the tool can handle very large JSON files (up to several megabytes) depending on your device’s memory. There are no server-side limits.