HTML Minifier Online
Compress HTML, CSS, and JavaScript code instantly. Free, fast, and runs 100% in your browser.
Page speed directly impacts search rankings and user experience. Minifying your HTML removes unnecessary whitespace, comments, and redundant attributes — shrinking file sizes by 20–60 percent without changing functionality. This browser-based HTML minifier processes your code locally, so proprietary markup never leaves your machine. Paste your HTML, click Minify, and copy the optimized output for production deployment.
- Powered by Terser — the same engine used by Webpack, Vite & Rollup
- Full AST parsing — safely handles strings, template literals, regex & all ES2024+ syntax
- Dead code elimination, constant folding & optional variable mangling
- Syntax errors are caught and reported with line numbers
Feature Overview
| Feature | Details |
|---|---|
| HTML minification | ✓ |
| CSS minification | ✓ |
| JS minification | ✓ |
| Preserves functionality | ✓ |
| Server upload | None — 100% local |
Frequently Asked Questions
Will minifying break my HTML?
No. The minifier only removes whitespace and comments. All tags, attributes, and content remain intact.
How much smaller will my file be?
Typical savings range from 20% to 60%, depending on how much whitespace and commenting your source contains.
Does it minify inline CSS and JavaScript too?
The tool focuses on HTML structure. For CSS and JS minification, use the dedicated CSS and JavaScript modes in the Text Minifier tool.