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USB Device diagnostics

Test what the browser can see. Know when it cannot.

Use standard browser tests first; WebUSB is only for compatible devices that the browser is allowed to access directly.

Run these first

Relevant live checks

WebUSB Device TestRequest a compatible USB device through WebUSB and display the browser-exposed manufacturer, product, vendor, and product IDs.
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USB Vendor & Product ID CheckRead vendor and product IDs for a WebUSB-compatible device that you explicitly select.
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Device & Browser Information CheckSee browser-exposed screen, viewport, language, CPU-thread class, memory class, connection hints, and platform information without installing software.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Identify which higher-level device type this is

  2. 2

    Try a known-good cable/port

  3. 3

    Use WebUSB only if the device is compatible

What DeviceOK/browser can help check
  • Request compatible WebUSB devices
  • Show exposed VID/PID and product strings
  • Test higher-level camera/audio/gamepad APIs when applicable
What this browser page cannot prove
  • Access every USB device claimed by the OS
  • Measure USB voltage/current generically
  • Repair drivers