Does Webflow support the backdrop blur filter and are there any workarounds if it's not working on the live site?

Webflow does support the CSS backdrop-filter (including blur()), but it may not work as expected without specific setup and browser support. Here's how to ensure it works and troubleshoot if it doesn't appear correctly on the live site.

1. Use backdrop-filter With a Semi-Transparent Background

• Select the element where you want the blur effect (usually an overlay or a background div).
• Set the backdrop-filter: blur(...) in the Style panel → Effects or apply it via custom CSS.
• Make sure the element has a semi-transparent background (e.g., using rgba() or hsla()) like rgba(255,255,255,0.6)—this is essential for backdrop-filter to be visible.

2. Add Webflow Custom Code as a Fallback

• If you're using blur on a component Webflow doesn't fully support natively (like pseudo-elements), use custom code in the Page Settings → Custom Code section (inside <style> tags).
• Example: #blur-div { backdrop-filter: blur(10px); background-color: rgba(255,255,255,0.5); }

3. Ensure Proper Browser Support

• backdrop-filter is not supported in all browsers, especially older versions of Safari or Firefox.
• Make sure you’re testing in modern browsers like Chrome, Edge, or Safari 15+ where this property is supported.

4. Enable Hardware-Accelerated Rendering

• Sometimes CSS blur effects require transform tricks to trigger GPU rendering.
• Add transform: translateZ(0) or will-change: transform to the blurred background container to improve performance and visibility.

5. Check Publish and Deployment

• Effects might appear in the designer preview but not on the published site if:
• You’re relying on custom code that’s only in the Designer and not in the live environment.
• Your browser is caching old stylesheets. Try hard-refreshing the published site (Shift + Reload).
• A browser extension or ad blocker is interfering with rendering.

6. Webflow Hosting and Server Optimizations

• Webflow optimizes published code. Sometimes using backdrop-filter in inline styles or specific component types (like Symbols) may behave differently after publishing.
• If needed, test the same code in a non-symbol div or simplify the DOM structure to isolate issues.

Summary

Webflow supports backdrop-filter: blur(), but it requires a semi-transparent background, modern browser support, and sometimes minor CSS tweaks (like GPU triggers) to render properly. Use custom styles and verify in the live published site for final behavior.