SPEEDTESTER
How fast is your internet?
Check download, upload and responsiveness in one test.
Connection speed test
Connecting to the test server…
Test settings Up to 64 MiB
Quick checks use up to 24 MiB. One MiB is about one megabyte.
Higher data allowances help fast connections collect enough samples. How the test works
Live speed chart
Waiting for first measurement
Network assessment
Evidence-based, not speculative
Activity tests.
Select the activities you want to compare, then run them together.
Build your network scenario
Select activities and how many concurrent sessions to model.
Test configuration
Control the intensity and traffic budget of your scenario.
Simulated game traffic; this does not connect to a real game.
Assumed concurrent demand, not measured utilisation.
Beyond the speed test.
Check this browser, and learn which network details need a direct connection to your equipment.
Browser-only device responsiveness
Check whether this browser stays responsive over three seconds. It runs on your device without transferring test data. It does not measure internet speed or system CPU usage.
What we can see about your connection
Your network path
What we can and cannot directly observe
Cloud measurements show the end-to-end path. Independent router, mesh and ISP-node measurements require authorised integrations.
Available checks and measurement limits
Internet path
Effective throughput, baseline responsiveness, loaded RTT excess and measured browser main-thread scheduling pressure.
Gateway & router
Separate WAN from LAN performance, queue depth and network-device resource use where authorised.
Mesh & Wi-Fi
Mesh parent links, wireless backhaul, radio retries, link quality and per-satellite diagnostics.
ISP infrastructure
Access-node utilisation and direct provider-side faults require actual operator telemetry.
Advanced: check access to your published server
Public Cloudflare Tunnel reachability proof
Run the included local proof companion through your Cloudflare Tunnel. The edge makes one authenticated HTTPS request to the exact proof URL. This verifies tunnel-published application access, not direct NAT port forwarding.
Test history.
Results are saved in this browser only. Nothing is sent to a reporting account.
How to read these measurements
Clear boundaries produce trustworthy results.
Directly measured
Bytes received from Cloudflare, uploaded bytes acknowledged by the edge, browser-observed round-trip times and latency during transfer phases.
Modelled, not impersonated
Workload profiles evaluate aggregate synthetic bandwidth demand and responsiveness targets; they do not contact games, exchanges or AI providers.
Not yet measurable here
Router-to-ISP speed, mesh backhaul, radio statistics and physical ISP access-node congestion cannot be determined from a standard browser alone.
Internet speed, latency and Wi-Fi guides
Internet speed, latency and Wi-Fi guides
A speed test is a snapshot of the path between this browser and a measurement server. Compare download and upload capacity with responsiveness under load, then use repeatable checks to investigate a problem.
Frequently asked questions
Why are some speed or latency results unavailable?
A valid metric needs enough verified observations and sustained sampling time. A short window, exhausted data budget or insufficient RTT probes produces an inconclusive result rather than a guessed speed.
Can this test identify my router, mesh backhaul or ISP fault?
The browser measures the end-to-end path. Direct router, radio, mesh and physical ISP observations require authorised integrations that are not connected in this public beta.
Are these real games and streaming services?
No. Workload profiles generate synthetic traffic against controlled endpoints. They do not certify third-party services, and one browser cannot reproduce contention among several physical Wi-Fi devices.
Are my results uploaded to a reporting account?
Results stay in this browser unless you export them. Cloudflare still processes the network requests and temporary synthetic data needed to deliver the site and run tests.