WHAT IT MEASURES
DownloadBandwidth to nearest Cloudflare edge node
UploadUpstream via Cloudflare Workers proxy
PingRound-trip latency — median of 20 samples
JitterLatency std-dev — indicates stability
GRADING SCALE
SLIGHTSPEED≥ 500 MbpsFibre class
AEXCELLENT≥ 200 MbpsGigabit territory
BSTRONG≥ 80 MbpsPremium broadband
CSTEADY≥ 25 MbpsSolid everyday link
DLIMITED≥ 5 MbpsBasic connectivity
FCRITICAL< 5 MbpsBelow threshold
PRIVACY
TrackingNone — runs entirely in your browser
DataNo results leave your device; history is
local-only
NetworkOnly test traffic goes to Cloudflare anycast
NOTES
CorporateFirewalls may throttle upload to non-whitelisted
endpoints — results may be lower than local ISP
tests
Versionv2.0 — built on Three.js, Cloudflare Speed
API
