JS Minify / Beautify

Minifying JavaScript strips whitespace, comments, and line breaks, and often shortens local variable names — none of that changes how the code runs, but it noticeably shrinks the file for a faster load.

How to use it

• Minify: paste JavaScript code and the tool compresses it while keeping its behavior identical.
• Beautify: paste minified code with no indentation to get a readable version for analysis or debugging.
• Beautifying is especially useful for picking apart a third-party minified script when no source map is available.

Common uses

• Quickly minifying a small script without setting up a full build tool.
• Beautifying minified code from a third-party library to understand what it does.
• Inspecting a suspicious or unclear minified script before trusting it to run.

Things to keep in mind

Minification isn't obfuscation — variables get renamed to shrink size, not to hide logic; serious obfuscation needs dedicated specialized tools.

Minified code in production without a source map is hard to debug — the line numbers in error messages won't match the original file.