Free HTML Minifier Online
Minify HTML by removing comments, collapsing whitespace, and stripping unnecessary characters. Reduce page size for faster load times.
HTML files often contain comments, extra whitespace, indentation, and blank lines added for readability by developers. All of this adds bytes that the browser ignores when rendering the page. Removing them reduces the size of each HTML response, which means faster downloads on slow connections or for pages requested millions of times per day. This tool minifies HTML by stripping HTML comments, collapsing multiple whitespace characters to a single space, and removing whitespace between tags. It is useful for inlining HTML into JavaScript strings, comparing HTML before and after minification, or understanding what a bundler removes.
HTML Minifier
How to use this html minifier
- Paste your HTML into the input box.
- Click Minify to remove comments and collapse whitespace.
- The output shows the minified HTML and the size reduction in bytes and percentage.
- Click Copy to put the minified HTML on your clipboard.
Common use cases
- Reducing the size of an HTML email template before sending
- Inlining a snippet of HTML into a JavaScript string or template literal without indentation
- Comparing the output of two HTML generators to see if they produce equivalent minified results
- Understanding what characters are removed by a build pipeline's HTML minification step
Frequently asked questions
Does minification break the page?
Minifying standard HTML does not change how the browser renders the page. However, whitespace-sensitive elements like <pre> and <textarea> should not have their internal whitespace collapsed. For production HTML, use a proper build tool like html-minifier-terser that handles these edge cases.
Should I minify HTML in production?
It depends. With gzip or Brotli compression enabled, HTML minification saves little additional space — compression already removes redundant characters efficiently. The bigger wins are from JavaScript and CSS minification.
Are HTML comments always safe to remove?
Almost always. The main exception is Internet Explorer conditional comments. If you are not targeting IE, removing all comments is safe.
What is the difference between minification and compression?
Minification removes redundant characters (whitespace, comments) without changing the structure. Compression (gzip, Brotli) encodes the byte stream more efficiently using repetition patterns. Both reduce transfer size; compression usually gives larger savings.