JavaScript压缩工具

基础的JavaScript压缩：移除注释和不必要的空白。生产环境请使用真正的压缩工具（Terser、esbuild）。

如何使用本工具

1
Paste or type your JavaScript into the input textarea.
2
The minified output appears instantly in the panel below as you type — there is no button to press.
3
Check the size readout (original length, an arrow, and minified length) to see how much was removed.
4
Select the text in the output box and copy it manually into your file.

JavaScript压缩可减小代码包体积并缩短解析时间。本工具执行基础的空白和注释移除。对于生产环境的代码包，请使用Terser、esbuild或SWC：它们会进行变量名混淆和死代码消除，从而产生体积大幅缩小的输出（通常可减少60%到80%）。

Quickly shrinking a short, comment-heavy snippet before pasting it into a tight inline <script> tag.
Stripping comments out of a code sample to share a compact version in a chat or gist.
Estimating roughly how much comment and whitespace overhead a small file carries before setting up a real build.
Cleaning up a hand-written configuration object or constant block that has no strings containing slashes.
Demonstrating to students or teammates what basic comment and whitespace removal looks like versus a real compiler.
Minifying a tiny utility function for a bookmarklet where pulling in a full toolchain is overkill.

它和Terser相比如何？▼

Terser要激进得多：变量名混淆、死代码消除等。本工具只移除注释和空白。

这会破坏我的代码吗？▼

只有当你的JS存在语法问题时（在含义不明确的位置缺少分号）才会。现代JavaScript是安全的。