Glossary

What Is CDN (Content Delivery Network)?

A Content Delivery Network (CDN) is a geographically distributed network of servers that caches and delivers web content (images, CSS, JS, video) from locations close to the end user. Instead of every request going to a single origin server, a CDN routes users to the nearest 'edge' server — dramatically reducing latency, improving page speed, and reducing load on your origin server.

How CDNs improve performance

Without a CDN: a user in Tokyo loading a site hosted in London experiences ~250ms of network latency just for round-trip time. With a CDN: the same user loads cached assets from a Tokyo edge server in ~10–20ms. CDNs cache static assets (images, CSS, JS) at edge locations globally. Dynamic content (API responses, server-rendered HTML) is typically not cached but can be routed via CDN with shorter paths.

CDN and Core Web Vitals

CDNs primarily benefit LCP (Largest Contentful Paint) by making images and assets load faster from nearby edge servers. They also improve TTFB (Time to First Byte) for cached responses. Using a CDN for your hero image, fonts, and JavaScript bundles can meaningfully improve LCP scores — especially for internationally distributed audiences.

Popular CDN options

Cloudflare (free tier, DDoS protection, global network, used by canvasbuilder.co). AWS CloudFront (pay-per-use, deeply integrated with AWS services). Fastly (enterprise-focused, used by GitHub and Stripe). Bunny.net (affordable, simple setup, DigitalOcean Spaces compatible). Vercel Edge Network (built into Vercel deployments). For most sites, Cloudflare's free tier is the first and best choice.

CDN (Content Delivery Network) & Canvas Builder

canvasbuilder.co serves all static assets through Cloudflare's global CDN, and AI-generated template preview images are served from DigitalOcean Spaces CDN — ensuring fast load times for users worldwide.

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Frequently Asked Questions

Do I need a CDN for a small website?

Not necessarily for a very small local site, but for any site with global visitors or image-heavy content, a CDN meaningfully improves load times. Cloudflare's free tier takes 5 minutes to set up and provides CDN, DDoS protection, and SSL — there's little reason not to use it.

Does canvasbuilder.co use a CDN?

Yes — canvasbuilder.co uses Cloudflare as its CDN, with static assets also served from DigitalOcean Spaces CDN (cdn.digitaloceanspaces.com) for generated images.