JemdoHardware Tester
Free, local and zero install

Private online webcam test

Grant camera access only when you are ready. Verify the selected camera, negotiated format and actual frames delivered to the browser.

Video stays on your device. Jemdo does not upload or store camera frames, snapshots or device identifiers.

Loading local tester

How to test

  1. Select Start camera test and approve access.
  2. Choose a camera and requested video profile.
  3. Check actual resolution and frame cadence, then take a local snapshot if needed.

What it checks

  • Local camera preview
  • Camera selection
  • Actual resolution
  • Browser-observed frame cadence
  • Local snapshot

Frequently asked questions

Is my webcam video uploaded?

No. The MediaStream is attached directly to the local video element and is not sent to Jemdo.

Why is actual resolution different from the preset?

Browser constraints are negotiated with the camera and operating system. The page shows requested and actual settings separately.