Why crop pictures
Cropping removes what you do not want — empty space, a messy background, a finger in the corner, or a border around a scan — and gives the picture the shape a platform expects, such as square profile photos or wide video thumbnails.
How the two crop modes work
With a ratio — Square 1:1, 4:3, 3:4, 16:9, 9:16 for stories, or 3:2 — the largest possible area with that shape is taken from the centre of the picture. With “Remove edges (pixels)”, you type how many pixels to cut from the top, right, bottom and left, which lets you crop from one side only. Several pictures can be cropped the same way at once.
Which ratio to use
1:1 suits profile pictures and Instagram posts, 16:9 suits YouTube thumbnails and presentation slides, 9:16 suits stories and reels, 4:3 and 3:2 match most camera photos, and 3:4 suits portrait prints. For official ID photos with millimetre sizes, Passport Size Photo Maker is the better tool.
Common problems and how to fix them
The important part is cut off by a ratio crop: ratio crops are centred; first remove edges on one side so the subject is in the middle, then apply the ratio. The cropped picture is small: cropping removes pixels; start from the largest original you have. Crop is slightly off: adjust the pixel numbers in small steps and try again.
Good habits
Keep the original uncropped picture, crop before resizing or compressing, and check faces and text are not too close to the new edges.