The Network Information API exposes hints — connection type, effective type (like 4g), estimated downlink, round-trip time, save-data preference and online status. These are estimates for adaptation (serve lighter images on slow links), not a speed test.
Support varies by browser: Chromium exposes the most; Safari and Firefox expose little or nothing. Values are coarse buckets, can be stale, and change as you move between Wi-Fi and mobile data. For a true speed measurement, use a dedicated speed test; use this page to understand what websites adapt to.
How it works
Open this page and the embedded script queries only documented browser APIs. Nothing is installed, no account is needed, and results reflect your current browser profile — including extensions, private mode and OS display scaling.
Limitations
Support varies by browser. Privacy features (tracking prevention, user-agent reduction, fingerprint randomization) can generalize or withhold values. Treat results as a best-effort live snapshot rather than a certified hardware inventory.
Privacy
Detection runs in your browser. We do not store fingerprints or device reports. The only network call any tool makes is the optional public-IP lookup on /my-ip (via a third-party IP API, disclosed in the privacy policy).