Clarity over raw numbers
Four metrics on a dial help engineers. A single score with per-activity ratings helps everyone else decide what to do next.
About
Internet diagnostics that make sense
InternetSpeedTest.fit measures your connection and translates the result into language you can act on.
What we optimise for
Measurement you can trust
Tests run against the closest available server, and results are never adjusted to flatter any provider.
Privacy by default
No accounts, no logins, no advertising profiles. Results stay in your browser session.
How the test works
Three phases, roughly 25 seconds end to end.
1 · Latency and stability
We open a low-bandwidth stream to the nearest measurement server and sample round-trip time repeatedly, deriving ping, jitter and packet loss from the distribution rather than a single probe.
2 · Sustained throughput
Parallel connections saturate the downstream and then the upstream link. We report sustained throughput after the ramp-up window, not the peak burst, because that is what streaming and backups actually get.
3 · Scoring
Each measurement is normalised against real-world requirements and weighted: download 35%, upload 20%, ping 20%, jitter 15%, packet loss 10%. Per-activity ratings re-weight the same inputs for what each activity depends on.
See where your connection stands
A full download, upload, latency and stability test takes under 30 seconds. No account, no install.