Free HTML Minifier Online

The HTML Minifier is a free online tool that compresses HTML code by removing extra whitespace, comments, and optional tags to reduce page size.

Yes, it is completely free with no registration required. All minification happens client-side in your browser.

Yes, the HTML Minifier only removes unnecessary characters and formatting. Your page will render identically after minification.

Absolutely. The HTML Minifier processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the HTML Minifier is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the HTML Minifier in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The HTML Minifier works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Minification and Gzip solve the same problem in two different layers, and they stack rather than compete. Minification rewrites your source code itself, permanently deleting bytes a browser never needs — whitespace, comments, redundant attributes, and optional closing tags. Gzip and Brotli are transport compressions your server applies on the fly to whatever it sends, shrinking the response further before it travels over the network. Because minified HTML is already smaller and more repetitive, Gzip often compresses it even more efficiently afterward, so using both gives the best transfer size. This tool minifies your markup and also shows an estimated Gzip size next to the raw byte count, so you can gauge the realistic over-the-wire saving rather than just the file size on disk. Paste your HTML to see both figures at once.

The three presets trade compression for caution. Safe removes only comments, extra whitespace, and empty attributes, so the output is guaranteed to behave like your original — ideal for handwritten layouts you can't easily re-test. Balanced is the default and adds inline CSS and JavaScript minification, boolean-attribute collapsing, and redundant-attribute removal for stronger compression that stays safe on almost all pages. Aggressive turns on quote removal, optional closing-tag dropping, and attribute sorting to squeeze out every possible byte; it produces valid HTML5 but can surprise older parsers, templating engines, or strict XML toolchains, so always test that output before shipping. Each preset is just a starting point — once you pick one, you can fine-tune the individual options underneath it. Choose a preset above and watch the savings percentage update instantly.

No. Although the minifier strips ordinary HTML comments to save bytes, it deliberately preserves conditional comments such as <!--[if IE]> and <!--[if lt IE 9]>. Those blocks aren't decorative notes; older versions of Internet Explorer read them to load fallback stylesheets, polyfills, or alternate markup, so deleting them would quietly break legacy behavior. The tool detects the conditional syntax and skips it during comment removal, while still clearing the regular human-readability comments around it. This means you get the byte savings of comment stripping without sacrificing compatibility logic you may still depend on for email templates or enterprise intranets. If you no longer support those browsers you can remove the comments manually beforehand, but the safe default is to keep them. Paste your markup and the minifier handles the distinction automatically.

It helps, though it's one input rather than a silver bullet. Whitespace and comments commonly make up a meaningful slice of an uncompressed HTML document, and removing them means fewer bytes to download and parse before the browser can start rendering. On slow mobile connections that shorter download directly feeds Largest Contentful Paint, the loading metric Google measures for ranking, because the document arrives and the first meaningful content paints sooner. Minified inline CSS and JavaScript also reach the parser faster. That said, HTML weight is usually smaller than your images, fonts, and scripts, so minification works best alongside those optimizations and server-side Gzip or Brotli. This tool reports the original size, minified size, and exact percentage saved so you can see the gain before deploying. Run your page through it to quantify the byte reduction.

Yes. Alongside the single-paste workflow, the tool includes a batch mode for processing several HTML files in one pass. You add multiple files, the minifier runs your chosen preset and options across all of them, and you can download the compressed results together rather than repeating the steps file by file — useful when you're shrinking a whole template directory or a set of email layouts. Each file is still handled entirely in your browser, so even a batch of proprietary markup never leaves your machine. The tool also keeps a local history of recent jobs, stored only in your own browser, so you can revisit earlier sizes and savings without re-running anything. As with single files, test aggressive output before shipping. Open batch mode above to queue your files and minify them in one click.