Free Online Code Minifier - HTML, CSS & JavaScript
Shrink your code files by stripping unnecessary whitespace, comments, and line breaks from HTML, CSS, and JavaScript. Minification is a standard web performance optimization that reduces bandwidth usage and improves page load times - especially important for production deployments and improving Core Web Vitals.
How to Use
Select your code language (HTML, CSS, or JavaScript), paste your source code into the input area, and the minified output appears instantly. The file size reduction percentage is displayed so you can see exactly how much smaller your code has become. Copy the result with one click.
Why Minify Your Code?
- Faster Page Loads: Smaller files download faster, improving user experience and reducing bounce rates on your website
- Better Core Web Vitals: Minified CSS and JavaScript directly improve Largest Contentful Paint (LCP) and reduce blocking time
- Reduced Bandwidth Costs: Serve smaller files to every visitor - particularly impactful for high-traffic websites and mobile users
- Improved Lighthouse Scores: Google Lighthouse and PageSpeed Insights reward minified code in their performance audits
- SEO Benefit: Page speed is a confirmed Google ranking factor for both mobile and desktop search results
What Minification Removes
HTML: Whitespace between tags, HTML comments, optional closing tags, and redundant quotation marks in attributes. CSS: Whitespace, comments, trailing semicolons, and unnecessary units. JavaScript: Whitespace, comments, line breaks, and unreachable code while preserving full functionality.
Privacy Guarantee
Your code stays entirely in your browser. No server uploads, no logging, no storage - complete privacy for your proprietary source code.
Last reviewed: July 2026.