HeroTools / Text & Code
Local · Private · Free

HTML/CSS/JS Minifier

Strip comments, collapse whitespace and shorten colors — safe transforms only, with live size savings, right on your device.

Language auto-detects when you paste
Load file — drop or click

🔒 Your code never leaves your browser. Nothing is uploaded.

— before → — after 0% saved

About HTML / CSS / JS Minifier

HTML / CSS / JS Minifier is a free, private text & code tool that runs entirely in your web browser. Minify HTML, CSS & JS with safe whitespace/comment stripping — live size savings readout. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for css minifier, js minifier, html minifier, minify code. Like every HeroTool by Digital Heroes, HTML / CSS / JS Minifier is 100% free with no limits.

How to use HTML / CSS / JS Minifier

  1. Open HTML / CSS / JS Minifier — it runs entirely in your browser, with no signup.
  2. Paste or type your text or code into the editor.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is HTML / CSS / JS Minifier free?

Yes — HTML / CSS / JS Minifier is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. HTML / CSS / JS Minifier runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does HTML / CSS / JS Minifier do?

Minify HTML, CSS & JS with safe whitespace/comment stripping — live size savings readout.

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