Contact us

We'd love to hear from you, whether it's a bug report, a suggestion for a new test or a question about a result.

Email us at [email protected]. We read everything and usually reply within a few days.

Reporting a problem

If a test isn't working as expected, it helps to include:

• which test you were using,
• your browser and its version, and your operating system or device,
• for controller issues, the controller model and how it's connected (USB or Bluetooth),
• what you expected to happen and what happened instead.

We can't see your results or anything you did on the site, because everything runs in your browser, so a screenshot is often the most useful thing you can send.