A ratio describes shape without fixing the final resolution. A square can be 300 by 300 or 1200 by 1200. Aspect cropping uses that shape to keep the largest matching area from the source.
Aspect Ratio Cropper offers common square, landscape and portrait ratios. Choose the ratio and an anchor, then inspect the crop overlay before processing.
Square and banner crops behave differently
A 1200 by 800 source cropped to 1:1 keeps an 800 by 800 area. With a centre anchor, the horizontal excess is removed evenly from the sides.
The same source cropped to 16:9 keeps approximately 1200 by 675. The crop removes height rather than width. A top anchor protects content near the upper edge; a bottom anchor protects the lower edge.
Pixel dimensions are rounded where the ratio calculation needs it. The operation aims at the requested shape within a discrete grid of pixels, not an infinitely precise physical rectangle.
A ratio is only the first requirement
A social platform may request both a ratio and minimum dimensions. This crop handles the shape, but the resulting file still needs to meet that platform's size and byte requirements.
For an exact output such as 1200 by 675, the Cover Crop or Social Preparation tool gives a fixed canvas. Use the ratio crop when you want to retain source resolution first and resize later.
No automatic subject detection is performed. A face near the edge can be cut off even though the overlay looks geometrically correct.
Review the important content within the highlighted area, then check the downloaded dimensions. A familiar ratio does not guarantee that every subject fits comfortably inside it.