Guides

How to test a microphone before a meeting

A 30-second routine to make sure your mic works and sounds clear before a call.

How to fix a microphone not working in a browser

Step-by-step fixes for permission, device, and no-signal problems.

How to find dead or stuck pixels

Use full-screen solid colors to spot pixels that don’t match the field.

Dead pixel versus stuck pixel

What the difference is and which one might recover.

How to check monitor refresh rate

Estimate your display’s refresh rate in the browser and understand the caveats.

How browser hardware tests protect privacy

Why local, in-browser testing keeps your media and inputs private.