Remove black bars
Finds the black edges automatically and crops them off. The detected box is still draggable, because detection is occasionally a pixel or two out. Free, no upload, no account.
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Black bars get baked in when footage passes through a player, a screen recorder, or a platform that letterboxed it. They are part of the picture now, and cropping is the only way out.
A frame from a third of the way in is sampled — not the first frame, because a lot of clips open on a black fade and that would make the whole picture look like a bar.
If detection comes back with almost nothing left, the crop is left at full frame instead. Better to leave it alone than to hand back a 2×2 video.
FAQ
Why the frame a third of the way in?
Many clips fade in from black. Sampling the first frame would read the entire picture as a bar and crop it to nothing.
What if the bars are not perfectly black?
Compression turns pure black into low-value noise, so anything under a small threshold counts as black. Very dark grey bars may need a manual drag.
Can I adjust what it found?
Yes, the box stays draggable after detection.
Does it handle bars on all four sides?
Yes, each side is measured separately.
Will it ever crop too much?
If it computed a box smaller than a fifth of the picture it gives up and leaves the frame whole.