Internet Speed Test
See how browser-based speed tests measure download, upload, latency, and jitter, and how to run them for consistent results.
How Browser-Based Speed Tests Work
Speed tests typically open multiple parallel connections to a nearby server and transfer data in each direction for a defined period of time. By measuring how much data is moved per second, the test estimates your available download and upload throughput. Additional probes measure latency and jitter by sending small pings or HTTP requests.
Results are influenced by many factors, including WiFi quality, background traffic on your network, and congestion between you and the test server. Running several tests at different times of day gives a more accurate picture of real‑world performance.
Tips for Getting Accurate Speed Test Results
For best results, use a wired Ethernet connection when possible, close heavy downloads or streaming apps, and pause large cloud backup tasks. If you must test over WiFi, move close to the router and minimize interference from other devices.
On desktop systems you can also cross‑check browser results with command‑line tools such as curl or specialized speed‑test CLIs that run similar measurements from the terminal.