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JSON 格式化与校验

在线格式化、美化、压缩和校验 JSON 数据。支持语法检查和自定义缩进。免费使用，无需注册。

What is JSON Formatter?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. This JSON formatter tool helps you format, beautify, minify, and validate JSON data. Simply paste your JSON, click Format, and get a clean, readable output. Perfect for debugging API responses, config files, and data processing.

功能特性

  • Format & beautify JSON with custom indentation (2, 4, or 8 spaces)
  • Minify JSON for production use
  • Validate JSON syntax with detailed error messages
  • 100% 客户端处理——你的数据绝不会离开浏览器

常见问题

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使用方法

  1. Paste your JSON data into the input field on the left
  2. Choose your preferred indentation (2, 4, or 8 spaces)
  3. Click 'Format / Beautify' for readable output, or 'Minify' for compact output
  4. Copy the result using the copy button

常见用途

  • Debugging API responses and payloads
  • Formatting configuration files (package.json, tsconfig.json)
  • Validating JSON data before processing
  • Minifying JSON for production use

常见问题

What is JSON formatting?
JSON formatting is the process of adding proper indentation, line breaks, and spacing to JSON data to make it more readable. It doesn't change the data itself, just its visual presentation.
Is this JSON formatter safe to use?
Yes, 100% safe. All processing happens directly in your browser. Your JSON data is never sent to any server or stored anywhere.
Can I validate JSON with this tool?
Yes. Click the Validate button to check if your JSON is syntactically correct. The tool will show detailed error messages if any issues are found.