WS
Whitespace
Spaces, tabs, newlines outside strings.
HTML, CSS, JS & SVG minifier online
HTML · CSS · JS · SVG · run locally, without uploading code to a server
Free No account required
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This is a fast, local heuristic minifier. It does not replace a production parser or bundler; quoted strings are preserved and their contents are not rewritten.
This tool patches one problem at a time
The Performance module in Insight does the same in every audit: Core Web Vitals in every audit — with priorities, history and before/after comparison.
/ About the tool
Why minification actually helps
An HTML, CSS, JavaScript and SVG minifier removes unnecessary whitespace and comments — the code still works, usually at a smaller size.
Bundlers (Vite, Webpack, Rollup) do this automatically. This tool is for one-off jobs — a snippet, a static CDN file, or a quick before/after check.
Everything runs in the browser. Your code never leaves the device.
/ Glossary
What we strip
//
Comments
Single-line // and multi-line /* */ — for developers, not end users.
AAA→a
Mangling (JS only)
Shorter variable names. Full pipelines do this in the bundler.
Brotli
Server compression
After minify, the server should still apply Brotli or gzip.
/ FAQ
Frequently asked questions
A code minifier removes unnecessary whitespace and comments from HTML, CSS, JavaScript or SVG to reduce file size. It does not replace a bundler or Brotli/gzip compression.
No. This version runs in the browser, so pasted code is not sent to CometWeb.
Not in this free tool. Source maps usually come from your build pipeline.
Compile to JS first (Babel/SWC), then minify.
Not here. Use the JS obfuscator for drop-console.
/ Related tools