JSON Formatter & Validator
Beautify, minify, and validate JSON. Paste your data, format it, and copy — all in your browser, nothing uploaded.
不收集数据
没有数据库，没有账户。我们无法查看您的文件。
极速
浏览器原生处理 — 无需上传，无需等待。
100%免费
无限制，无水印，无隐藏费用。
无需账户
无需登录。打开工具即可使用。
Formatting and validating JSON
Beautify vs. minify
Beautifying adds indentation and line breaks so JSON is easy to read and debug. Minifying strips all that whitespace to make the smallest possible payload for production or APIs. This tool does both, plus validation.
Instant validation
If the JSON has a syntax error — a trailing comma, a missing quote, an unclosed bracket — the formatter shows the parser's error message so you can find and fix it quickly.
Private by design
Parsing happens entirely in your browser, so sensitive config, tokens, or API responses never leave your device — unlike formatters that send your JSON to a server.
Frequently asked questions
Does it validate as well as format?
Yes. Invalid JSON won't format — instead you get the exact parser error message.
What indentation can I use?
2 or 4 spaces for formatting, or minify to remove whitespace entirely.
Is my JSON uploaded?
No. It's parsed and formatted locally in your browser.
Is there a size limit?
Only your device's memory — there's no server upload limit.