Free online HTML minifier and compressor. Reduce HTML file size by removing whitespace, comments, optional tags, and unnecessary attributes. Optimize page load speed for better Core Web Vitals and SEO performance. Essential for web developers optimizing website performance. 100% browser-based.
100% browser-based — your data never leaves your device
Minify and compress HTML code by removing whitespace, comments, and unnecessary attributes.
Copy your HTML source code and paste it into the input textarea above.
Press Minify to compress your HTML by removing whitespace, comments, and optional attributes.
Copy the minified HTML for use in production. Compare the size savings shown below.
Drop a file here or click to browse
Ctrl+Enter to minify
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This tool compresses HTML by removing everything the browser does not need, leaving markup that renders identically but weighs far less.
Whitespace-sensitive content such as pre blocks is handled carefully, and everything runs locally in your browser.
Every byte you remove from your HTML is a byte that does not have to cross the network, which makes minification a direct lever on page load time. This tool is the last step before deploying templates and static pages: format and edit the source during development, minify it for the build, and ship the compressed version. The size comparison feedback also helps you spot problems, since a page that shows almost no savings likely carries little whitespace and may not be worth the minification trade-off.
For generated markup, the gains compound. Email templates, server-rendered fragments, and CMS exports accumulate indentation and comments that are pure overhead in production. Stripping comments alone removes decorative weight without touching a single rendered element, and the attribute minification option further trims optional quotes and redundant values where it is safe to do so.
The HTML you are optimizing is usually the actual product, whether that is proprietary pages, internal tooling, or templates destined for a client. Uploading it to a remote minifier hands a copy of your source to an outside service.
Local minification means the raw markup and the compressed result both stay on your machine. Production code never leaves your device, so there is no third-party copy of your site's source to worry about.
Copy your HTML source code and paste it into the input textarea above.
Press Minify to compress your HTML by removing whitespace, comments, and optional attributes.
Copy the minified HTML for use in production. Compare the size savings shown below.
Practical examples to help you get the most out of HTML Minifier:
Input (245 bytes): <html> <head><title>Test</title></head> <body><p>Hello World</p></body> </html> Output (75 bytes): <html><head><title>Test</title></head><body><p>Hello World</p></body></html>
Input: <!-- Header section --><header><h1>Welcome</h1></header><!-- end header --> Output: <header><h1>Welcome</h1></header>
Some CSS layouts depend on whitespace between inline-block elements. Test your pages after minifying to ensure visual layout hasn't shifted due to whitespace removal.
Always keep a formatted version of your HTML before minifying. Minified code is difficult to edit. Use source control or keep both formatted and minified versions.
Minification removes unnecessary characters like whitespace, comments, and optional quotes without changing how the HTML renders in the browser.
Yes. Minified HTML is optimized for file size, not readability. Use the HTML Formatter to beautify minified code when you need to edit it.
Proper minification preserves functionality. However, whitespace-sensitive content (like inside <pre> tags) is handled carefully.
Typical savings are 20-40% for well-formatted HTML with comments and indentation. Larger files with more whitespace see bigger gains.
Removes unnecessary spaces, tabs, and newlines while preserving content and structure.
Removes HTML comments to reduce file size without affecting rendering.
Optionally removes optional quotes and boolean attribute values where safe.
See original vs minified size with the exact byte savings displayed.
HTML Minifier is useful in a variety of scenarios across different workflows:
Reducing HTML file size for faster website page load times
Preparing production-ready HTML templates for deployment
Removing unnecessary whitespace and comments from generated markup
While minification preserves functionality, always test your pages after minifying to ensure nothing broke. Some edge cases with whitespace-sensitive content can cause issues.
For maximum performance, minify HTML, CSS, and JavaScript together. The combined savings from all three can reduce page weight by 50% or more.
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