What is a JSON formatter?

A JSON formatter is a tool that converts compressed or minified JSON data into a human-readable format with proper indentation and line breaks. It helps developers easily read, edit, and debug JSON data.

How do I format JSON online?

To format JSON online: 1) Paste your JSON text into the input field, 2) The tool will automatically format it with proper indentation, 3) Choose your preferred indentation (2, 4, or 8 spaces), 4) Copy the formatted result. No login or installation required.

Can I validate JSON with this tool?

Yes, this tool automatically validates your JSON as you type. If there are syntax errors, it will show clear error messages indicating what went wrong and where the error occurred.

Is this JSON formatter free?

Yes, this JSON formatter is completely free to use. No registration, no login, and no limitations. All processing is done in your browser for privacy.

DevTools Hub

JSON格式化工具

实时反馈格式化、验证和压缩JSON

缩进:

输入

在此粘贴JSON...

输出

格式化的JSON将显示在这里...

提示

• 粘贴JSON后将自动格式化

• 使用Cmd+V粘贴

• 使用Cmd+C复制结果

• AI驱动的TypeScript接口生成功能即将推出！

JSON Formatter - Format, Validate & Minify JSON Online | DevTools Hub