How to Implement Browser Caching and CDNs on Webflow?

Browser caching and CDN delivery are two of the most effective performance improvements available on Webflow — and both are largely handled automatically. The value of this checklist item is understanding what Webflow provides by default, what it doesn't, and where the gaps are.

What Webflow provides by default: Webflow hosts all sites on Fastly, a major CDN with edge servers worldwide. When a visitor in Tokyo accesses your site, Fastly serves cached assets from a nearby edge node, not the origin server. This happens automatically for all published Webflow sites. Browser caching is also set automatically — static assets like images, fonts, CSS, and JavaScript are served with cache-control headers that tell browsers to store them locally. Return visitors load these assets from cache rather than making new network requests.

Where the limits are: Webflow's CDN caches your published site. When you publish a change, the cache is purged and new content propagates to edge servers — usually within seconds to minutes. Dynamic CMS collection pages are rendered differently from static pages and assets. Webflow handles this, but CMS pages won't have the exact same edge caching behavior as fully static content.

What you can control: if you're serving custom fonts or scripts from external sources (Google Fonts, third-party CDNs), those are cached according to those providers' own headers. Google Fonts sets a one-year cache lifetime — effectively permanent for most users. Self-hosting fonts in Webflow's asset library means they're served from Webflow's CDN under Webflow's cache settings.

Monthly check: in PageSpeed Insights, look at "Serve static assets with an efficient cache policy." Resources on Webflow's domain will have Webflow's cache headers. Resources on third-party domains might not — check those specifically and see if you can self-host or replace them.

For a standard Webflow site, browser caching and CDN delivery aren't things you set up — they're things you verify are working and understand the limits of. The work here is knowing what the defaults give you and where custom code or third-party resources might be creating gaps in coverage.