CDN & Global
CDN Latency Test: Measure CDN Performance from Your Location
Content delivery networks (CDNs) cache website assets at edge servers distributed worldwide, reducing latency by serving content from a location close to the user. Our CDN latency test measures your round-trip time to major CDN providers from your current location.
Launch in Mission ControlWhat It Measures
This tool measures your latency to edge servers operated by major CDN providers including Cloudflare, AWS CloudFront, Fastly, Akamai, and others. It reports which CDN has the lowest latency from your location and helps you choose the best CDN for your target audience.
How It Works
- Sends requests to test endpoints hosted on each major CDN provider
- Measures round-trip time to the nearest CDN edge node for each provider
- Compares results to show which CDN is closest and fastest from your location
- Reports cache hit vs origin latency where distinguishable
Why It Matters
The best CDN for a website depends heavily on where most of its users are located. A CDN with strong US coverage may have poor performance in Southeast Asia. Testing CDN latency from real user locations helps site owners choose a CDN that serves their audience most effectively.
Understanding Your Results
CDN latency under 20ms indicates an edge server is nearby (same metro area). 20 to 50ms is good coverage. 50 to 100ms means the nearest edge is in a different region. Above 100ms suggests no nearby CDN presence and content may be falling back to origin. Latency under 50ms is typical for well-covered areas.
Ready to test?
Run CDN Latency Test Now →Frequently Asked Questions
What is a CDN and how does it work?
A CDN (Content Delivery Network) is a globally distributed network of servers that caches copies of website content at locations around the world. When a user requests content, it is served from the nearest CDN edge server rather than the origin server, dramatically reducing latency and improving load times.
Which CDN is fastest?
Cloudflare consistently ranks as one of the fastest CDNs globally due to its massive number of edge locations (300+ cities). Fastly and Akamai also perform strongly for enterprise users. AWS CloudFront has excellent coverage in AWS regions. The fastest CDN for your users depends entirely on where your users are located.
Does every website need a CDN?
Websites serving a global audience benefit significantly from a CDN. If your users are mostly local to your server's location, a CDN offers less improvement for latency but still benefits availability and DDoS protection. For static assets (images, CSS, JS), CDNs are almost universally beneficial regardless of audience geography.
How does CDN caching affect TTFB?
CDN-cached content has very low TTFB (under 50ms) because it is served from an edge server with no origin database queries. Dynamic content that cannot be cached must go to the origin server, resulting in higher TTFB. Maximizing CDN cache hit rate is the most effective way to reduce perceived page load times globally.
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