How Can I Identify and Remove Unused Images and CSS from My Website?

Identifying Unused Images and CSS Styles in a Website

Finding unused resources in a website can be a tedious task, but it's essential for optimizing performance and minimizing the file size of your site.

Images:

One way to identify unused images is through Google Chrome's "Audits" feature. By opening the DevTools (F12) and navigating to the "Audits" tab, you can perform an "Accessibility best practices" audit, which will identify unused image files.

CSS:

Chrome version 59 onwards also offers "CSS code coverage" and "JS code coverage" capabilities. By using these features, you can analyze which CSS and JavaScript code is actually executed on your site. Any unused CSS declarations or ID/class selectors can be identified and removed.

Additional Tools:

There are also third-party tools available to detect unused resources in your website.

• Lighthouse: An automated web analysis tool that includes an "unused CSS and JS" audit.
• Web Developer browser extension: Provides a "CSS Unused" feature that displays unused CSS selectors.
• CSS Profiler Bookmarklet: A simple tool that generates a list of unused CSS rules.

By utilizing these methods, you can significantly reduce the overhead of unused images and CSS styles, resulting in a faster and more efficient website.

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