JavaScript压缩器

What does JavaScript minification do?

It removes whitespace, comments, and newlines, and may rename local variables to single characters. The resulting code is functionally identical but much smaller.

Can minified JavaScript be reversed?

Not perfectly. You can run a JS beautifier to re-add whitespace, but original variable names are lost. Use source maps in production to link minified code back to the original for debugging.

How much does JS minification save?

Typically 30–70% file size reduction. A 100 KB script often minifies to 30–60 KB, and further compresses with gzip to 10–20 KB.