A banner usually needs exact dimensions. The source photograph rarely shares its ratio. Cover cropping fills the box by removing material from one direction rather than distorting the subject.
Image Cover Crop creates the exact output width and height you enter. The anchor determines which part of the source is retained when the extra area is cut away.
See what a square removes
A 1200 by 800 photo filled into 600 by 600 uses a square portion of the source. With a centre anchor, approximately 200 source pixels are removed from each horizontal side before the crop is scaled down.
A left anchor keeps the left edge and cuts more from the right. A right anchor does the reverse. Top and bottom matter when the source is taller than the required ratio.
The tool does not detect a face or a product automatically. Choose the anchor by inspecting the source, particularly when the important subject sits near an edge.
Exact size comes with a content tradeoff
If the crop removes a sign, hand or product detail, a perfect dimension match is not enough. Use a padded composition when the entire source needs to remain visible.
A source already matching the target ratio needs no ratio crop, although it may still be resized. Enlarging a small source can soften it even when the cover operation itself is appropriate.
For batches, the same anchor is applied to each file. That can work for consistently framed products and fail for portraits with subjects in different positions.
Inspect the generated previews one by one before downloading a batch ZIP. The output dimensions confirm the box was filled; the preview is where you confirm that the right content survived.