HTML Minifier
Remove comments, collapse whitespace, and minify inline CSS and JavaScript with html-minifier-terser. Paste HTML or upload files — see the size reduction instantly. Batch mode included, 100% in your browser.
Why Minify HTML? Faster First Paint
Server-rendered pages, email templates, and static exports are often full of comments and indentation that add bytes without changing what the browser draws. An HTML minifier strips that away and — because this tool uses html-minifier-terser — also compresses the CSS in your <style> blocks and the JavaScript in your <script> blocks in the same pass. The page your users download is smaller and reaches a painted state sooner.
Because HTML is the first thing the browser parses, shrinking it improves First Contentful Paint and Largest Contentful Paint — Core Web Vitals that influence search rankings. Minified HTML plus server-side gzip or Brotli commonly cuts total transfer size by well over half.
Minify the Whole Front-End
HTML rarely ships alone. For the best results, minify your stylesheets with the CSS Minifier and your scripts with the JavaScript Minifier as well — or start from the Minify Tools hub to do all of them. Keep the readable source in version control and generate minified output at build or deploy time.
Frequently Asked Questions
What does an HTML minifier do?
An HTML minifier removes characters that the browser does not need to render your page — HTML comments, redundant whitespace between tags, optional closing tags, and empty attributes — and can also minify the CSS inside <style> tags and the JavaScript inside <script> tags. This tool uses html-minifier-terser, the industry-standard minifier used by major build tools, so the output is markup that renders identically at a smaller size.
Will minifying HTML break my page or its inline scripts?
No. html-minifier-terser is conservative by default and understands HTML structure, so it will not remove whitespace where it is significant. Content inside <pre>, <textarea>, and <code> where spacing matters is preserved, and inline CSS/JS is minified with the same safe csso/terser engines rather than crude text replacement.
Does it also minify the inline CSS and JavaScript?
Yes. When your HTML contains <style> or <script> blocks, the minifier compresses those too — CSS via csso and JavaScript via terser — so a single pass shrinks the whole document. This is especially useful for email templates, landing pages, and server-rendered HTML where styles and scripts are inlined for performance.
Can I minify several HTML files at once?
Yes. Use the batch tab to drop in or select multiple .html files; each is minified locally and the tool reports per-file and total savings. Nothing is uploaded — all processing happens in your browser, so it is safe to use with private or unreleased pages.
How much smaller does HTML get, and does it help SEO?
Whitespace-heavy, templated HTML often shrinks 10–30%, more when large comment blocks or inlined assets are present. Smaller HTML reaches the browser faster and reduces render-blocking work, improving First and Largest Contentful Paint — Core Web Vitals that feed into Google rankings. With server gzip/Brotli on top, total transfer size drops further.