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.

Pointer probe

Pointer probe supplied by the surface.

Diagnose a pointer from move-event timestamps, reporting polling rate and capabilities. 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]

Verdict

Overall pointer diagnosis.

Polling rate (Hz)

Measured event rate in hertz.

Polling class

Nearest common polling-rate label.

Buttons

Set bits in the reported button mask.

Touch points

Reported maximum touch points.

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.

• Webcam Tester

  Diagnose a webcam from a captured frame probe, reporting verdict, frame rate, and resolution.

• Audio Output Tester

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

• Microphone Tester

  Diagnose a microphone from captured level windows, reporting verdict, loudness, and noise floor.