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Test a website's performance
Mobile testing is provided by
and you will be taken to the Akamai website for the results.
Select a device
Cambridge, MA - iPhone 4 iOS 5
Munich, Germany - iPhone 4 iOS 5
Washington, DC iPad iOS 5
Ohio iPhone Simulator, 3G Speed iOS 5
Dulles, VA Nexus S Android 2.3
Enable Video Capture?
Make Results Private?
Recent Industry Blog Posts
Cloudflare’s Response to CSAM Online
Boomerang Performance Update
Thinking about color
Performance Tips for Background Video
Helping to create the Web Almanac
The Serverlist: Full Stack Serverless, Serverless Architecture Reference Guides, and more
The ugly truth about optimising beautiful images
A History of HTML Parsing at Cloudflare: Part 2
The Undeniable Benefits of WebP
A History of HTML Parsing at Cloudflare: Part 1
Introducing the HTMLRewriter API to Cloudflare Workers
Harnessing the Power of the People: Cloudflare’s First Security Awareness Month Design Challenge Winners
Google Considering “Public Badge Of Shame” For Slow Websites.
Optimized JS snippet for Firebase Performance Monitoring
Operationalizing Performance with Performance Budgets
WebPageTest Scripting: Examples for advanced speed testing scenarios
Introducing Flan Scan: Cloudflare’s Lightweight Network Vulnerability Scanner
The Essential CDN Glossary
10 Great Web Performance Blogs
Even faster connection establishment with QUIC 0-RTT resumption
Which Metrics Should You Track to Improve OTT Quality of Experience?
Log every request to corporate apps, no code changes required
This Is How We Test Our Performance With JMeter
CPDoS Attacks: Why Global Monitoring Is Essential for Web Performance Management
What’s new with Workers KV?
What is wrong with my site
Testing results is horrible
Cdn and others problems show in testing result
cdn completely down
Can I test locally?
Visually Complete pushed back too much
your help with results
Waiting time to first Byte
Get test IDs from api
Throughput analysis for a Video File from CDN Providers
Blog performance heart me on test results
ServiceWorker in Chrome causing delays, serialized requests
Detecting "DOM Content" Hiding in WPT
Webpagetest local instance.
Random test run is taken
CDN not Detected
Last Painted Hero's impact on SEO
How to optimize JS?
WPT Speed Index versus LH Speed Index