JSON Formatter & Validator
JSON 格式化
& 校验工具
Paste JSON to format, validate, or minify. 粘贴 JSON 数据，一键格式化、校验或压缩。
Input / 输入
Output / 输出
Result will appear here... / 格式化结果将显示在此处...
What is this tool?
This JSON formatter helps you format, validate, beautify and minify JSON data directly in your browser. No data is uploaded to any server.
How to use
- Paste JSON into the input box.
- Click Format, Minify or Validate.
- Review the output and any error messages.
- Copy or download the result.
Example
Input: {"name":"EasyTool","local":true}
Formatted:
{
"name": "EasyTool",
"local": true
}Common problems
- Missing comma between properties
- Trailing comma after last property
- Unquoted property name
- Single quotes instead of double quotes
- Invalid escape sequence
Privacy
This tool runs entirely in your browser. Your JSON input is processed locally and is never uploaded to our server.
FAQ
Is my JSON uploaded?
No. This tool processes your input locally in your browser. Nothing is sent to our server.
Can this tool validate JSON?
Yes. It detects common JSON syntax errors such as missing commas, trailing commas, unquoted keys and invalid escape sequences.
What is the maximum JSON size?
There is no hard limit, but very large files (over 10 MB) may slow down your browser.