HTML minification is one of the easiest performance optimizations you can apply to a website. By stripping comments, removing unnecessary whitespace, and tightening HTML syntax, you reduce file size and improve page load times — especially on slow networks and mobile devices.
This free online HTML minifier runs entirely in your browser with no server upload. It removes HTML comments, collapses whitespace, normalizes boolean attributes, and optionally removes quotes on safe attribute values. You control which optimizations to apply via the toggle options.
Use it to quickly minify HTML templates, email markup, landing pages, or any HTML snippet before deployment. Pair it with the JavaScript Minifier and CSS tools elsewhere on this site for a complete frontend optimization workflow.
Frequently Asked Questions
Q:How does the HTML minifier work?
It processes your HTML entirely in your browser. The minifier strips HTML comments, collapses whitespace (reducing multiple spaces/newlines to compact form), and optionally removes quotes on simple attribute values. It also normalizes boolean attributes and removes unnecessary self-closing slashes on void elements.
Q:Is my HTML uploaded to any server?
No. All minification happens client-side using string processing in your browser. Your HTML code never leaves your device, making it safe for proprietary templates, production markup, or any sensitive content.
Q:How much smaller will my HTML be?
Typical savings range from 15–40% depending on how much whitespace and comments your HTML contains. Heavily documented or indented markup sees the biggest reduction. The tool shows exact byte counts and percentage saved after each minification.
Q:What does "Remove optional quotes" do?
If enabled, it removes quotation marks around attribute values that only contain safe characters (letters, digits, hyphens, underscores, colons, semicolons, periods, slashes). For example, class="container" becomes class=container. Use with caution — some stricter HTML parsers may require quoted values.
Q:Can this minify inline CSS and JavaScript too?
The HTML minifier focuses on the HTML structure itself — stripping comments, collapsing whitespace, and compressing attribute syntax. For inline CSS and JS within style and script tags, use our dedicated CSS minifier or JavaScript minifier tools for optimal compression.