See your camera, its real resolution and frame rate before your next call.
Check that your camera works before a video call. Press Start camera, allow access when the browser asks, and you get a live preview along with the actual resolution, the frame rate the camera reports, and a measured frames-per-second count from the video itself.
If you have more than one camera, pick it from the list and the preview switches over. The preview is mirrored by default, like looking in a mirror, and you can turn that off. A Snapshot button saves the current frame as a PNG.
Nothing is recorded or uploaded. The video goes from your camera to this page and nowhere else, and Stop releases the camera so its light turns off.
The most common causes are blocked permission, another app (a call app or another tab) already using the camera, or a privacy shutter or switch. The test tells you which case it hit. To allow a blocked camera, click the camera or lock icon in the address bar, set Camera to Allow and reload. On a Mac or Windows PC, also check the camera privacy setting in the system settings.
No. The preview is drawn only in this page. Nothing is uploaded or stored, and a snapshot is saved straight to your device as a download.
Mirroring makes the preview behave like a mirror, which most people find natural. It only affects your own view; people on a call see you unflipped. You can turn it off here.
Many cameras lower their frame rate in dim light to collect more light per frame. A busy USB hub or a heavily loaded computer can also drop frames. Try more light first.
Every calculation happens on this page, in your own browser. Your input is never sent to a server and never logged, which also means the tool keeps working when you are offline.