Shrink HTML by stripping comments and whitespace the browser never needed. Fast, free, and built for simple browser-based workflows.
Paste your HTML above, then click Minify HTML.
728 x 90 In-Content Ad
HTML Minifier is a free online tool that removes the comments and whitespace a browser never needed, so a page file takes fewer bytes to send. Paste your markup, click Minify HTML, and you get back output that renders identically, with the before and after character counts shown.
Reach for it when page weight is being paid for on every request: an email template where the client caps message size, a static page served without a build step that would minify it for you, or a widget snippet you hand to someone else to paste into their site. It is also a quick way to measure the problem -- the percentage saved tells you how much of the file was never markup at all.
Everything happens inside your browser and the markup is never uploaded. That matters when the page belongs to a client project, carries internal URLs, or is simply not public yet. With no round trip to a server, a large file minifies as fast as a small one, and the result stays on your device unless you copy or download it.
Drop the markup you want to shrink into the HTML to Minify box.
Collapse extra whitespace and Remove comments are ticked by default. Tick Remove optional attribute quotes for a few more bytes if you control the markup.
Click Minify HTML. The line above the result shows the old and new character counts and how much smaller the file became.
Click Copy for the clipboard, or Download to save the markup as minified.html. Clear empties both boxes.
Yes! All our tools are 100% free to use with no hidden costs, no registration required, and no credit card needed.
Absolutely. All tools run entirely in your browser (client-side). Your data never leaves your device and is not sent to our servers.
Yes, once the page is loaded, the tool will continue to work even if you lose internet connection since it runs in your browser.
There is no strict character limit, but very large amounts of text (100,000+ characters) may slow down your browser.
Yes! All our tools are free for both personal and commercial use.
It depends on how the file was written. Hand-indented markup commonly drops 10 to 25 percent, while a page full of template comments can lose more. Markup that was already minified barely changes. The result line shows your exact before and after counts, so you never have to guess.
Yes. The tool only removes whitespace that browsers already ignore and comments that were never rendered. Tags, attributes and text content pass through unchanged, so valid markup stays valid. Conditional comments are kept deliberately, because deleting those would change behaviour in old browsers.
Because whitespace inside pre, textarea, script and style is meaningful. Collapsing it would change what a visitor sees or break JavaScript that relies on line breaks. Those blocks are set aside before minifying and put back exactly as they were. Use the CSS Minifier for stylesheets.
Only when you own the markup and nothing strict parses it afterwards. HTML allows unquoted values that contain no spaces or special characters, and the option touches only those safe cases. Leave it off if the file passes through a template engine or an XHTML parser.
Not from the minified copy -- deleted comments and formatting are gone for good. Keep your source file and treat the minified version as build output. If you only need it readable again, the HTML Formatter will re-indent the structure, though the comments do not come back.
A little, and mostly on large pages or slow connections. Trimming bytes from the HTML helps most when the file is big or served uncached. It will not fix unoptimised images or render-blocking scripts, which usually cost far more time than markup whitespace ever did.