Minify HTML by removing comments, extra whitespace, and optional tags to reduce document size.
HTML MinifierGratisCSS & DevRuns in your browser
Works in your browser. What you paste or upload is processed on your device.
Key features of the HTML minifier
Removes whitespace between HTML tags
Strips HTML comments
Removes optional closing tags
Collapses boolean attributes
Shows size reduction percentage
How to use the HTML minifier
01
Paste your HTML
Enter your HTML code into the minifier input.
02
Minify
Click 'Minify HTML' to compress the code.
03
Review the output
See the minified HTML and size savings achieved.
04
Test in browser
Verify the minified HTML renders correctly in a browser before deploying.
05
Deploy minified HTML
Use the minified HTML in your production environment.
What is an HTML minifier?
The HTML Minifier compresses HTML documents by removing unnecessary whitespace between tags, stripping HTML comments, removing optional closing tags, and collapsing redundant attributes — producing a smaller HTML file that loads faster without changing the rendered output.
HTML minification is a standard production optimisation. The initial HTML document is the most critical resource for page performance — it blocks rendering until fully downloaded. Reducing HTML size directly improves Time to First Byte (TTFB) and first contentful paint.
Why use an HTML minifier?
The initial HTML document must download before any other page resources can begin loading. Reducing HTML size shaves precious milliseconds from TTFB and first render — improvements that compound positively on Core Web Vitals scores and user experience.
For standard HTML, yes. The minifier removes only optional whitespace that doesn't affect rendering. Whitespace-sensitive content (pre, code blocks) is preserved. Always test before deploying.
How much does HTML minification reduce file size?
Typically 5–25% reduction, depending on how much whitespace and comment content exists. HTML files with many comments or generous spacing see larger reductions.
Should HTML be minified in a CMS?
Most CMS platforms and CDNs can minify HTML output automatically. WordPress has plugins (Autoptimize, WP Rocket), and Cloudflare can minify HTML at the CDN level without touching source files.
Will minifying HTML break JavaScript inside script tags?
This tool is conservative with inline script content. However, for production deployments, it's safer to serve JS as external files that are separately minified.
Does HTML minification affect SEO?
Indirectly — faster HTML download improves Core Web Vitals scores which are a ranking factor. The content of the HTML (headings, meta tags, structured data) is not affected by whitespace removal.
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