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.

Storage probe

Storage probe supplied by the surface.

Assess storage health from a usage probe, reporting headroom classification and warnings. 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]

Used (%)

Share of quota currently used.

Free space (B)

Quota bytes not yet used.

Headroom

Remaining-space classification.

Persisted

Whether persistent storage has been granted.

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.

• Battery Checker

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

• 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.

• Webcam Tester

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