Is your Wi-Fi up or down?

If this test cannot reach the internet at all, check whether other devices on the same Wi-Fi are online. If none are, restart the router; if the router lights show no internet, it is your provider. If only one device is offline, it is that device or its Wi-Fi connection.

For one person browsing and streaming HD video, 25 Mbps is enough. 4K streaming needs about 25 Mbps per stream, video calls about 3 to 5 Mbps each, and a family with several people online at once is comfortable with 100 Mbps or more. For gaming, low latency and jitter matter more than speed.

The usual causes: distance or walls between you and the router, many devices sharing the connection, an old router, interference on a busy 2.4 GHz channel, or a problem at your internet provider. Test again close to the router, or with a cable, to tell Wi-Fi problems from internet problems.

Latency (ping) is how long a message takes to reach the server and come back, in milliseconds: under 30 ms is great, over 100 ms feels laggy in games and calls. Jitter is how much that time varies; high jitter makes calls choppy. Loaded latency is the latency while the connection is busy, and a big jump there is called bufferbloat.

It measures your connection against Cloudflare's network, which has servers in hundreds of cities, so the test uses a server close to you. The test data goes to Cloudflare's speed test service; this site does not store your results.