Camera

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Negotiated resolution

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Negotiated frame rate

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Facing mode

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Max resolution (reported)

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Max frame rate (reported)

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FPS is counted from frames the browser actually delivered (video frame callback). “Negotiated” values are what the browser agreed with the camera; “max” values are the limits it reports and are not available in every browser.

Measured on a 64-bin histogram of a small downscaled copy of the frame, about twice a second, as 8-bit brightness. Too dark means average at or below 50; too bright at or above 190; clipped means 5% or more of pixels at 250+. Shaded zones on the histogram mark the dark and clipped ranges; the dashed line is the average. A flat black frame suggests a closed privacy shutter or a covered lens.

“Accepted” only means the browser agreed to the exact size you asked for. The browser or driver may still scale or crop the image in software, so this is an upper bound on what a web page can request, not a measurement of the sensor. Cameras that are busy or limited by USB bandwidth can be rejected at sizes they could otherwise handle.

Snapshots are saved as PNG at the full delivered frame size and are not mirrored by default, even when the preview is, so text in the picture reads correctly. The image stays in this tab's memory until you download it. For photo strips, see the Photo Booth tool.