What is HTML Minifier?
An HTML Minifier compresses HTML code by removing unnecessary whitespace, comments, and redundant characters. This reduces file size, speeds up page loading, and improves web performance—especially important for mobile users and slow connections.
Minified HTML is the industry standard for production websites. While it is harder to read, it loads faster, uses less bandwidth, and can improve Core Web Vitals such as First Contentful Paint (FCP) and Largest Contentful Paint (LCP).
This tool removes comments, extra spaces, and optional tags while preserving all functionality. Your markup behaves identically before and after minification—only the file size decreases. Perfect for deployment pipelines or optimizing existing sites.
How to Use HTML Minifier
- Paste or upload HTML: Paste your formatted HTML into the editor or upload an .html or .htm file. Works with both development and already-compressed HTML.
- Click Minify: Click Minify to compress the HTML. Redundant spaces, line breaks, comments, and optional closing tags are removed. The tool processes instantly.
- Review the result: The minified output appears in the result panel. It is functionally identical to your input—only whitespace and unnecessary characters are stripped.
- Copy or download: Copy the minified HTML to clipboard or download it for deployment to your production server or CDN.
No signup required. Works on desktop and mobile.
Frequently Asked Questions
Does minification break my HTML?
No. Minification only removes whitespace, line breaks, comments, and optional characters (like closing </p> before block elements). Structure, attributes, and functionality are fully preserved. Your page will render identically.
How much can HTML be compressed?
Typically 10–30% smaller, depending on original formatting, comments, and whitespace. Heavily commented or multi-line HTML often compresses more. Some pages see 40% or greater reduction.
Is minified HTML valid?
Yes. Minified HTML remains valid and works in all modern browsers. Search engines index it the same way. Validation tools (like W3C) will report the same result for minified and unminified versions.
When should I use minified HTML?
Use minified HTML in production—on live websites, CDNs, and assets served to users. Keep formatted HTML for development, debugging, and version control so your team can read and maintain the code.