Does it rename variables or mangle names?

No. This is a safe "obvious wins" minifier — it removes comments and collapses whitespace but never renames identifiers or rewrites your code, so valid input stays valid.

Are strings and regular expressions kept intact?

Yes. The minifier tracks string literals, template literals and regular-expression literals and copies their contents verbatim, so a comment marker or space inside a string is never touched.

Is my code uploaded anywhere?

No — minification runs entirely in your browser. Nothing is sent to a server, which makes it safe for proprietary code.

JavaScript Minifier

Strip comments and whitespace to shrink your JS.

Minify JavaScript in your browser

Paste any JavaScript to strip comments and collapse whitespace down to a compact single-pass result. It tracks string literals, template literals and regular expressions, so their contents are preserved exactly.

This is a conservative minifier: it does the obvious size wins without renaming variables or rewriting your code, so valid input stays valid. Everything runs locally — nothing is uploaded, which keeps proprietary source private.