HTML Minify & Beautify
Reduce your HTML size. Minify or beautify instantly.
Why use it
Optimized HTML, faster pages
10–20% reduction
Removes whitespace, comments, and optional tags to reduce page weight.
Private
HTML is processed in your browser. Never uploaded to any server.
Bidirectional
Minify for production or beautify minified HTML to read and edit it.
Instant
Results in milliseconds. No waiting or processing queues.
How it works
Three steps, no hassle
Paste or upload your HTML
Paste HTML code directly or drag an .html file. No size limit.
Choose: minify or beautify
Minify to reduce page weight or beautify minified HTML to read it comfortably.
Copy or download the result
The optimized HTML appears instantly. Copy to clipboard or download as a file.
FAQ
Got questions?
HTML minification removes: unnecessary whitespace and line breaks, HTML comments (<!-- -->), optional closing tags (such as </li>, </td> per the HTML5 standard), attributes with default values, and can shorten boolean attribute values. The resulting document is functionally equivalent to the browser.
A typical page's HTML is reduced by 10–20% with minification. While the impact is smaller than minifying CSS or JS (HTML is usually smaller), combined with gzip/Brotli compression it can noticeably reduce Time to First Byte (TTFB), especially for pages with verbose HTML such as CMS-generated templates.
In most cases no, but there are exceptions: JavaScript that uses whitespace to separate tokens (rare in modern code) or CSS that relies on line breaks. Minification tools like HTMLMinifier-terser are conservative by default and preserve inline JavaScript and CSS. Always test the result in a staging environment.
Both are needed and complementary. Minification reduces size before transfer (affects CDN cache and stored file). Compression (gzip, Brotli) reduces size during HTTP transfer. The server should be configured to serve compressed HTML. With both techniques, HTML can end up 80–85% smaller than the original uncompressed file.
Beyond minification: remove commented-out HTML that's no longer used, avoid excessive div nesting (div soup), use semantic HTML elements that are shorter (article, nav, main vs div class='...'), remove inline style attributes (move everything to external CSS), and for SPAs consider server-side rendering (SSR) or static site generation (SSG), which produces cleaner HTML.
HTML performance: parsing, TTFB, and document optimization
HTML document size affects Time to First Byte (TTFB) and the browser's initial parsing time. While a typical page's HTML is smaller than its CSS and JS resources, pages generated by CMSs like WordPress or Drupal can have very verbose HTML with debug comments, redundant classes, and unnecessary markup that easily exceeds 100 KB per page.
Server-side minification vs build-time minification represent two different approaches: build-time minification generates already-optimized static files (ideal for static sites, JAMstack, SSG), while server-side minification (via middleware like htmlmin for Python/Flask or Nginx plugins) optimizes dynamically generated HTML on each request. For high-traffic sites, build-time minification is more efficient as it avoids per-request CPU overhead.
HTMLMinifier (Douglas Crockford, 2010) was the historical reference for HTML minification. Its successor, HTMLMinifier-terser (actively maintained), supports HTML5, inline SVG and MathML. Benchmarks show it can reduce real-site HTML by 8–25% depending on template verbosity. For modern frameworks, plugins like vite-plugin-html or Next.js's built-in minification plugin integrate this optimization automatically into the build pipeline.