Compress your code instantly for faster loading speeds.
Minification strips everything a browser does not need to run your code — spaces, indentation, line breaks, and comments — without changing how the page behaves at all. The browser reads p{color:red} exactly the same as a neatly formatted, commented version; the difference is purely bytes on the wire. Less to download means faster rendering, which is why minified CSS and HTML are a standard step in shipping a fast site.
Typical savings run from 10% to 30% of file size, depending on how much whitespace and commentary the original carried. Heavily commented, generously indented source shrinks the most. On its own that is a modest win, but it compounds: it stacks with gzip/Brotli compression your server already applies, and it pays off on every single page load by every visitor — which is exactly the kind of small, permanent improvement Core Web Vitals reward.
Keep your readable, commented version as the file you actually edit, and minify a copy for production. Minified code is miserable to debug and maintain by hand, so it should be a build output, never your working file. Edit the pretty version, ship the small one.
Does minifying change how my page works?
No. It only removes characters that have no effect on execution — the rendered result is identical.
Can I reverse it back to readable code?
Not perfectly — comments and your original formatting are gone for good. That is why you keep the un-minified source separately.
Is minifying still worth it if my server uses gzip?
Yes. The two work together: minification removes redundant characters, then gzip compresses what remains, for a smaller payload than either alone.
Is my code uploaded anywhere?
No — minification runs in your browser, so your source never leaves your device.