Capability decoder
A USB-C plug tells you almost nothing.
Decode the claims you can see, flag connector and claim contradictions, and get the shortest verification checklist for the job you want the product to do.
Cable label or listing
What a browser can—and cannot—decode
USB-C describes the connector. Cable assemblies may support only USB 2.0 data, high-speed USB, USB4, a 3 A or 5 A current path, and different active or passive limits. USB-C video adapter cables add protocol-conversion limits and are not interchangeable with full-featured C-to-C cables.
Best available evidence
- A matching USB-IF certified performance/power marking and public product record.
- An e-marker reading from trusted operating-system telemetry or a capable hardware tester.
- Complete manufacturer specifications for the exact model, length, direction, and adapter modes.
- A controlled transfer, charging, or direct-display test.
A marker reading supplies declared identity fields, not a complete physical performance test. A voltage/current meter shows one charging session, not the cable’s maximum rating. If a power or data rating is absent, choose Not stated / unknown for that field. Unknown data is not an inferred 480 Mbps rating or a charge-only verdict. Choose 480 Mbps only when that data class is documented; a confirmed power record does not fill in a missing data claim.
Identify an unlabelled cable and interpret tester evidence · See the public sources behind these rules · Plan a video payload