Why is my accuracy 5 km on a desktop?

Desktops usually lack GPS and rely on Wi-Fi or IP-based location. Accuracy is limited to the density of Wi-Fi networks around you that the provider's database knows.

Why is altitude 'not available'?

Altitude only comes from GPS. Devices without GPS, or stationary GPS devices with poor vertical accuracy, return null.

Can CheckMySys see my coordinates?

No. The coordinates come from a browser API call that stays on this page. Your browser itself may contact Google or Apple to compute the position from nearby Wi-Fi networks — that is a browser-internal request you cannot observe from JavaScript.

Geolocation

Request your browser's GPS position and see every value the Geolocation API returns — including altitude, heading, and speed.

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