Use this check to inspect a browser, device, network, permission, media, or input capability directly in the current runtime before relying on it in another workflow.

Network probe

Network measurement probe supplied by the surface.

Grade a connection from latency samples and optional throughput measurements. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Quality tier

Overall connection quality classification.

Sample count

Number of successful latency samples.

Median latency (ms)

Median round trip in milliseconds.

Jitter (ms)

Mean absolute consecutive latency difference.

Loss (%)

Estimated packet loss percentage.

Downstream (Mbit/s)

Download throughput in megabits per second.

Upstream (Mbit/s)

Upload throughput in megabits per second.

Issues

Stable machine-facing degradation codes.

• Results describe the current browser session and can change with permissions, privacy controls, hardware, drivers, network path, power state, or browser updates. Unsupported or withheld information is not proof that the underlying capability is absent.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Repeat the check in the browser and device that will actually be used, then confirm important behavior with the relevant operating-system or network diagnostics. Avoid granting permissions that are unnecessary for the test.

• Audio Output Tester

  Diagnose audio playback from an output probe covering rate, channels, latency, and underruns.

• What Is My IP Address?

  Show the public IPv4 and IPv6 addresses available to the current internet connection, reporting either family as unavailable when its probe cannot connect.

• Battery Checker

  Assess a battery probe, reporting charge state, estimated runtimes, and low-charge warnings.