Speed Test · Diagnostics
How fast is your internet, really?
Pro-grade diagnostics: download, upload, ping, jitter, stability scoring, and real-world suitability for video calls, gaming, and streaming.
0.00
Mbps
Ready
Download
—Mbps
Upload
—Mbps
Ping
—ms
Jitter
—ms
What do these numbers mean?
How is this measured?
Parallel HTTP streams to Cloudflare's anycast edge. Latency is sampled 8 times with outliers trimmed; jitter is the average deviation from the mean.
Why does the result differ from my ISP's plan?
Browser tests measure end-to-end through Wi-Fi, OS, and TLS — not the raw line. For best accuracy use a wired connection and close other apps.
What is connection stability?
A 0–100 score derived from ping and jitter. Even fast connections feel laggy if stability is poor.
Can I track this over time?
Yes — signed-in users get free history. Pro adds unlimited history, automated monitoring, and alerts when performance drops.
What's next
Runs entirely in your browser. Nothing is sent to our servers.