How much can a free CDN speed up your website?

The internet moves fast, but the physical distance between your server and your visitors still matters. Data travelling from a UK server to Santiago, Chile takes around 193ms per round trip. That might sound trivial until you consider that a browser loading a single page makes dozens of separate requests for HTML, CSS, JavaScript, images and fonts – those milliseconds stack up quickly.

The ping test below shows real-world latency from Manchester to several locations around the world. It is a useful illustration of why geography affects performance, even on a fast connection.

Ping test results from Manchester, UK to multiple global locations showing latency in milliseconds — Ping test from Manchester to global locations, latency in milliseconds.

Take the Santiago figure as an example. On a vanilla Apache server with no caching, each asset request carries that 193ms penalty. Ten JavaScript files alone would add nearly two seconds. Twenty images would add almost four. Browsers do load many of these in parallel, so real-world figures are better than that, but the principle holds. Distance costs time, and time costs visitors.

What a CDN actually does

A content delivery network (CDN) is a geographically distributed group of servers that cache your site’s static assets and serve them from whichever location is closest to the visitor. Instead of every request travelling back to your origin server, the CDN handles it from a nearby node.

The practical benefits beyond speed include:

Reduced latency. Visitors load assets from a server close to them rather than your hosting location.
Better resilience. Most CDN providers include failover protection, so a traffic spike is less likely to take your site down.
Improved security. Because visitors no longer connect directly to your origin server, it is harder to target with DDoS attacks and bot traffic.

Some providers also layer on analytics, image compression and malware protection. These vary by tier and provider, so it is worth checking what is included before committing to one.

Choosing a CDN provider

The right provider depends on your site’s requirements, your budget and how much configuration you want to manage. There are well-known global platforms and smaller, more focused options. The comparison below gives a sense of what the market looks like.

Comparison of CDN providers including Cloudflare, Fastly, Akamai and others — A selection of CDN providers across the market.

For most sites, Cloudflare is the natural starting point. It operates nearly 300 data centres worldwide and includes DDoS protection, a Web Application Firewall, SSL/TLS encryption and DNS management on its free tier. That is a substantial feature set at no cost, which is why it remains one of the most widely used CDNs available.

The free tier exists because Cloudflare is betting that as your site grows, you will want paid features. That is a reasonable trade-off. You get genuine performance and security benefits from day one, and you can upgrade if your needs change.

One thing to watch with AccelerateWP

If you are on managed WordPress hosting and using the AccelerateWP plugin, you will see a CDN option in the settings. If you have already set up Cloudflare, disable the AccelerateWP CDN feature. Cloudflare operates at the domain level and covers everything beneath it. Running a second CDN layer alongside it creates conflicts rather than compounding the benefits.

AccelerateWP plugin settings showing the CDN toggle option — The AccelerateWP CDN option. Disable this if Cloudflare is already active on your domain.

Does your site actually need a CDN?

Honestly, many sites do not. For a small site with a local audience, the performance gains from a CDN alone are often negligible. That said, given that Cloudflare’s free tier includes security and caching features on top of the delivery network, there is rarely a strong reason not to use it. The question is less “should I use a CDN?” and more “what does my site actually need?”

These three scenarios cover most situations:

International or multi-region sites: E-commerce stores that ship globally, media sites with international readership, or any business serving customers across borders. A CDN ensures visitors in different regions get comparable load times. Without one, users far from your server will notice the difference, and on a transactional site, that affects conversions.
High-traffic domestic sites: Even without an international audience, a high-traffic site benefits from the caching and resilience a CDN provides. Offloading requests from your origin server reduces the risk of slowdowns during traffic spikes. Check what features are included on any free tier before assuming they match what you need.
Small or local sites: A restaurant, a local tradesperson, a community group. If your audience is concentrated in one area, a well-configured hosting setup and a fast, lean site will serve you better than adding CDN complexity. Hosting with a provider based near your audience achieves much the same result.

For most sites, Cloudflare’s free tier is worth setting up. It takes around 20 minutes to configure, adds a meaningful security layer and costs nothing. If your site is small and local, it is not urgent, but it is unlikely to hurt.

If you want to go further with WordPress performance, the WordPress caching guide covers the other half of the speed equation. For a deeper look at how DNS fits into all of this, our DNS explainer is a good place to start.

Speed is only one part of a well-performing site. If you are looking at the hosting side of the equation, our WordPress hosting is built with performance in mind, and pairs well with a CDN setup like the one described here.

If you have questions about configuring Cloudflare with your hosting account, the Cloudflare DNS migration guide in our knowledge base walks through the process. You are also welcome to get in touch if you would prefer to talk it through.