LibreSpeed measures download, upload, latency and jitter. It exchanges generated data, not your files. A test can use hundreds of MB or several GB: avoid starting on a limited mobile-data plan.
This is a short test to a shared server, not a certification of your ISP speed. The test is not speed-throttled. Other tests, distance and shared server capacity can still lower the result.
The test starts only when you choose to start it.
No account or server-side results history. Telemetry, ISP lookup and geolocation are disabled. Connecting still reveals your IP address to our infrastructure.
Guide and limits · LibreSpeed source · This deployment’s source · LGPL-3.0-or-later