Checks if CSS files are minified to reduce their size.
Minification is the process of removing all unnecessary characters from source code (like whitespace, comments, and newlines) without changing its functionality.
It significantly reduces the file size of your CSS files, which means they are downloaded and processed by the browser much faster.
Unminified CSS files are a major cause of slow page loads. This is a critical performance optimization for any modern website.
Run a free audit to see how your site performs on CSS Minification and 159 other checks.
Start Free AuditChecks if images use responsive techniques like srcset.
Checks if images have width and height attributes to prevent layout shift.
Checks for JavaScript errors in the browser console. (Note: In-dev check)
Measures the total size of the HTML document.