Compress HTML, CSS, and JavaScript instantly to boost your page speed and SEO score.
The Source Code Minifier by GrowthSyntax is a free, browser-based tool that compresses HTML, CSS, and JavaScript files instantly — reducing file size by removing unnecessary whitespace, comments, tabs, and newlines without breaking your code logic. Faster loading pages rank higher in Google, and the Source Code Minifier helps you achieve that with a single click, a copy, or a direct file download.
Code minification is the process of removing all unnecessary characters from source code — including whitespace, line breaks, comments, and redundant formatting — without changing how the code functions. The result is a smaller, faster-loading file that browsers can download and parse more quickly. HTML, CSS, and JavaScript files are the three most commonly minified assets on any website, and minification is one of the core recommendations in Google's Core Web Vitals and PageSpeed Insights performance reports.
Google uses page speed as a direct ranking factor in its search algorithm. Slow-loading pages rank lower, have higher bounce rates, and perform poorly in Core Web Vitals metrics like LCP and FID. Minifying your HTML, CSS, and JavaScript reduces the total byte size your server sends to browsers — resulting in faster first paint, faster time-to-interactive, and better PageSpeed Insights scores. The Source Code Minifier helps you implement this optimization without requiring a build tool, bundler, or command-line setup.
Removes HTML comments, collapses whitespace between tags, strips newlines and tabs — producing clean, browser-ready markup with no layout impact.
Strips CSS comments, removes spaces around selectors and properties, collapses multiple spaces, and trims whitespace for maximum stylesheet compression.
Safely removes single-line and multi-line JS comments, collapses whitespace around syntax operators, and trims redundant spacing without altering code logic.
Shows original size, minified size, and percentage savings side by side — so you can instantly quantify the performance improvement before downloading.
Copy your minified code to clipboard in one click, or download it as a production-ready .html, .css, or .js file directly from your browser.
The Source Code Minifier runs entirely in your browser. No code is sent to any server — your source files stay completely private at all times.
Stop serving bloated, uncompressed code that slows down your website and hurts your rankings. Use the Source Code Minifier by GrowthSyntax to compress HTML, CSS, and JavaScript instantly — completely free, browser-based, and always private.