Contact

We read every message. For bug reports, tool suggestions, questions about the site or privacy requests, email us at [email protected]. We usually reply within a few working days.

What to include in a bug report

The more detail you give, the faster we can reproduce the problem:

• Browser and version, for example Chrome or Safari on iPhone.
• Operating system, such as Windows 11, macOS, Android or iOS, with the version if you know it.
• Device, including the model of the phone, laptop, camera, monitor or controller involved.
• Which test you were using and the page address.
• What happened and what you expected. Add any error message and a screenshot if you can.

The System Info tool has a Copy as text button that collects most of this for you.

What we cannot help with

DeviceTest provides free online tests. We do not provide hardware repair, warranty service or data recovery, and we cannot diagnose a faulty device remotely. If a test shows a real hardware problem, contact the manufacturer, the seller or a repair shop. Our guide under each tool lists the common fixes to try first.