Is there a solution in Webflow to address CSS and Javascript optimization for improving the PageSpeed Score?

Webflow provides several built-in features and best practices to help optimize CSS and JavaScript for faster load times and improved Google PageSpeed scores. Here's how you can optimize directly within Webflow and by applying external tools.

1. Use Built-in Webflow Minification

• Webflow automatically minifies CSS and JavaScript when you publish your site from the Designer or Dashboard.
• This feature reduces file size by removing whitespace, comments, and unused code.
• To verify it's enabled, go to Project Settings > Hosting and ensure "Minify CSS" and "Minify JavaScript" are both toggled on.

2. Reduce Use of Custom Code

• External JavaScript (e.g., third-party widgets or marketing scripts) can negatively impact performance.
• Only include essential custom code in the Page Settings > Custom Code area or Site Settings.
• If you must use external scripts, load them asynchronously or defer them (e.g., add defer to <script> tags added in the embed areas).

3. Use Webflow’s Cleaner Class Management

• Unused CSS classes can increase file size.
• Regularly audit and clean styles in the Webflow Designer using the Style Manager.
• Delete unused classes and consolidate styles when possible.

4. Lazy Load Images and Videos

• Webflow automatically applies loading="lazy" to images by default.
• For videos, use lighter methods like YouTube previews or custom embeds with ?rel=0&enablejsapi=1.

5. Limit Interactions and Animations

• Webflow Interactions often rely on JavaScript.
• Minimize the use of complex animations, especially those triggered on page load or scroll.
• This reduces render-blocking scripts and improves First Contentful Paint (FCP) and Time to Interactive (TTI).

6. Avoid Third-party Fonts When Possible

• Custom web fonts can delay rendering.
• Consider using system fonts or Google Fonts with font-display: swap, which reduces the impact on performance.

7. Test with PageSpeed Insights and Adjust

• Before and after major builds, test with Google PageSpeed Insights.
• Focus particularly on reducing render-blocking resources, unused JavaScript, and large DOM sizes.

Summary

To optimize CSS and JavaScript in Webflow for PageSpeed scores, enable built-in minification, reduce custom scripts, clean up unused classes, use lazy loading, and avoid heavy animations. Regular testing and minimal third-party use greatly improve performance.