Internet Speed Test

Download, upload, latency and jitter, measured with parallel connections against Cloudflare's public test servers.

Mbit/s
Ready. Close other downloads for the most accurate result.
Download
– Mbit/s
Upload
– Mbit/s
Latency
– ms
Jitter
– ms

Previous results

How it works, and what it sends

Server: the test downloads and uploads random data to speed.cloudflare.com. Cloudflare therefore sees your IP address, like any website you visit. Nothing is sent to bastianstools.com, and there is no IP or ISP lookup.

Method: four parallel connections run for 8 seconds each way. The first second is ignored (TCP slow start), the rest is averaged. Latency is the median of 10 round trips; jitter is the average difference between consecutive round trips. Upload counts only completed requests, so it can read slightly low.

Honesty: if the test servers can't be reached you get an error, never an estimated value. Results shown above are not capped. Your last 10 results are stored in this browser only.