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.

Clock probe

Paired timestamp probe from the surface.

Estimate device clock offset and drift from paired device and reference timestamps. 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]

Skew

Overall synchronization classification.

Offset (ms)

Median device-minus-reference offset.

Spread (ms)

Range of observed offsets.

Samples

Number of paired samples analyzed.

Issues

Stable machine-facing warning 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.

• Browser Info Checker

  Parse a user-agent probe into browser family, engine, operating system, and device type.

• Device Info Checker

  Normalize and classify a device descriptor probe into tiers, form factor, and identification confidence.

• Pointer Checker

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