MetoolzyJavaScript Formatter
Beautify & Minify
Format JavaScript with proper indentation.
String Safe
Handles strings, comments, and template literals.
Copy Result
One-click copy to clipboard.
Client-side
All processing in your browser. No data uploaded.
关于JavaScript Formatter
The JavaScript & TypeScript Formatter is a free, browser-based tool that instantly beautifies or minifies your JavaScript and TypeScript code. Whether you received a minified bundle from a third-party library, wrote a quick script without caring about style, or need to reduce file size for production deployment, this formatter handles it all without requiring any installation or account. Beautifying adds consistent indentation to nested blocks, separates statements onto individual lines, and makes logic much easier to read and debug. Minifying strips whitespace, collapses line breaks, and removes comments to produce the smallest possible output — ideal for reducing page load times. The formatter correctly handles single-quoted, double-quoted, and template-literal strings so their contents are never accidentally modified, and it skips over both single-line (//) and block (/* */) comments. All processing happens entirely in your browser, meaning your proprietary code never leaves your machine. Adjust the indentation size between 2 and 4 spaces to match your team's coding style guide.
如何使用JavaScript Formatter
- Paste your JavaScript or TypeScript code into the left input panel.
- Choose your preferred indentation size (2 or 4 spaces) using the dropdown at the bottom.
- Click "Beautify" to format the code with proper indentation and line breaks, or click "Minify" to compress it.
- Review the formatted output in the right panel.
- Click "Copy" to copy the result to your clipboard and paste it wherever you need it.
常见问题
Does this formatter support TypeScript?
Yes. Because TypeScript is a superset of JavaScript syntax, the formatter handles TypeScript code correctly — including type annotations, generics, and interfaces — using the same parsing logic.
Is my code sent to a server?
No. All formatting and minification runs entirely in your browser using JavaScript. Your code never leaves your device and is not stored anywhere.
Why does the beautified output look slightly different from Prettier?
This tool uses a lightweight, dependency-free formatter focused on indentation and line breaks. For strict style enforcement (semicolons, quotes, trailing commas), use Prettier in your local development environment.
Can I use the minified output in production?
Yes, but for serious production use it is recommended to also run a proper bundler like esbuild or Terser, which perform dead-code elimination and other advanced optimizations on top of whitespace removal.
What is the difference between beautify and minify?
Beautify adds whitespace and indentation to make code human-readable. Minify removes all unnecessary whitespace and comments to make files as small as possible for faster delivery to end users.
JavaScript Formatter 完全使用指南与免费在线工具
无需安装、完全免费、纯前端本地运行的高效 JavaScript Formatter 工具
用于快速解决：美化和压缩JavaScript代码。。无需安装复杂软件，打开网页即可立即使用，极速且安全。
为什么选择 Metoolzy 的 JavaScript Formatter？
- 秒级即时响应: 极致性能优化，输入即可见结果。
- 数据绝对安全: 纯浏览器本地计算，数据绝不上传服务器。
- 完全免费使用: 无需注册登录，无任何隐形消费。
三步快速上手
- 打开 Metoolzy JavaScript Formatter 工具页面。
- 在输入区粘贴或上传您的数据。
- 即时查看处理结果并点击复制或下载。
功能对比表
| 对比项 | Metoolzy JavaScript Formatter | 普通在线工具 | 本地客户端软件 |
|---|---|---|---|
| 使用成本 | 永久免费 | 有次数限制或收费 | 需购买授权 |
| 隐私保护 | 纯本地内存运行 | 数据需上传云端 | 本地运行 |
适用人群与应用场景
- 软件开发人员日常调试与数据转换
- UI/UX 设计师资产处理
- 运营与办公人员效率提升
常见问题解答 (FAQ)
处理的数据会被记录或保存吗？
绝不会。所有运算均在您的浏览器本地完成，没有任何数据回传。