Skip to main content
Utilnivo

Developer

Utilnivo

JS Minifier

Compress JavaScript—strip comments and whitespace with byte savings shown.

No registration
  • On your device

Browse more in Developer or all tools.

Private on your device

Your information stays on your device and is not uploaded.

Related tools

Dedicated JavaScript compression for smaller scripts. Paste code, copy the minified output, and compare input versus output size. A conservative pass that does not rename variables or mangle identifiers.

How to use this tool

Paste JavaScript into the input editor. Review the minified output, use Format to beautify, then copy the compact script. Run your tests after minifying—especially if the source relied on automatic semicolon insertion at line breaks.

Worked example

Example: a 120-byte function with comments and indentation may shrink to ~70 bytes while keeping the same logic: `function greet(name){return 'Hi '+name}`.

How it works

Opens the JavaScript Formatter in minify mode. Strips block and line comments and collapses whitespace where safe, producing a smaller script without renaming identifiers.

Limitations

Lightweight whitespace minifier—not Terser or a bundler. Test after minifying. Use JavaScript Formatter and Minifier for format and minify in one panel.

Privacy and file handling

Your data stays on your device and is not uploaded.

FAQ

Frequently asked questions

How is this different from JavaScript Formatter and Minifier?

JS Minifier is compression-only with byte savings shown. The combined formatter also pretty-prints code and lets you toggle modes on the same input.

Is this the same as Terser or UglifyJS?

No. This is a lightweight whitespace and comment remover. It does not rename variables, dead-code eliminate, or parse ES modules.

Should I test after minifying?

Yes. Always run your tests—especially if the source relied on line breaks for automatic semicolon insertion.

Related pages

Page last reviewed: