HTML Minifier
Compress HTML markup, inline styles, and scripts to improve page load speed.
Why Minify HTML?
Development HTML carries indentation, comments, and optional attributes that add bytes for production visitors. Removing them shrinks the document the browser downloads and parses.
Smaller documents can improve metrics such as First Contentful Paint, especially when combined with compression and caching.
How HTML Minification Works
The minifier uses html-minifier-terser with whitespace collapsing, comment removal, redundant-attribute removal, a short doctype, and inline CSS and JS minification. The original and minified byte sizes are reported after each run.
Whitespace collapsing is safe for most pages, but it can affect rendering where significant whitespace sits between inline elements. Check the rendered result if your markup relies on that spacing.
Frequently Asked Questions
What is HTML minification?
HTML minification removes whitespace between tags, comments, and redundant attributes from a document to reduce its size without changing the rendered page.
Does HTML minification affect SEO?
No. The markup contains the same content and structure after minification, so search engines and browsers can parse it the same way.
Can I minify inline CSS and JS too?
Yes. The tool enables minifyCSS and minifyJS, so inline style and script contents are minified as part of the same pass.
Which transformations are applied?
Whitespace is collapsed, comments are removed, redundant attributes are dropped, script and style type attributes are removed, the doctype is shortened, and inline CSS and JavaScript are minified.