Is there a solution in Webflow to address CSS and Javascript optimization for improving the PageSpeed Score?
TL;DR
- Enable CSS and JS minification in Project Settings and rely on Webflow's asset optimizations like WebP and responsive images.
- Remove unused code, defer custom scripts, place third-party code in the footer, limit complex interactions, and disable unused features like jQuery when possible.
To improve your PageSpeed Score in Webflow, you can optimize CSS and JavaScript delivery using built-in settings as well as strategic design practices.
1. Enable Webflow’s Built-in Minification
- Go to Project Settings > Publishing tab.
- Enable Minify CSS and Minify JavaScript.
- These settings remove unnecessary whitespace and comments in your code, reducing file size.
2. Use Webflow’s Built-in Asset Optimizations
- Webflow automatically optimizes hosted assets like images and fonts.
- Ensure you're using WebP format for images and letting Webflow handle responsive image generation.
3. Limit Unused CSS and JS
- Avoid adding unnecessary interactions, animations, or third-party embeds/scripts you aren’t using.
- Reuse classes and limit use of custom code blocks, especially if they include full libraries (like jQuery plugins you don't need site-wide).
4. Use the 'Load Code' Responsibly
- For custom scripts, use defer or async loading when pasting into Project Settings > Custom Code.
- Place third-party scripts in the Footer instead of the Head, unless explicitly required.
5. Avoid Overuse of Webflow Interactions on Page Load
- Overly complex page load animations or interactions can delay content rendering.
- Simplify or delay non-critical animations using Webflow’s "scroll into view" or timing triggers.
6. Disable Unused Webflow Features
- If you're not using jQuery, it won’t be removed by default. But with Webflow’s newer layout tools (like grid and flex), you can often avoid needing jQuery altogether.
- Consider a custom export and remove jQuery manually if you're hosting externally and not using Webflow's default form/interaction features.
Summary
To optimize CSS and JavaScript for a better PageSpeed Score in Webflow, enable minification, minimize unused styles and scripts, defer custom code, and simplify your interactions. These steps collectively reduce render-blocking and improve overall performance.