Choose the output sizes in the left sidebar. Croppy makes one image for every selected source in every selected size.
The size sidebar
A custom size with an Auto height, and two Instagram presets ticked.
Tick a size to add it. Tick it again to remove it.
Click a group name to fold it away. The number next to a group shows how many of its sizes are ticked.
Search sizes finds sizes by group, name or dimensions, such as story or 1080x1920.
The bottom of the sidebar shows how many sizes are selected. Clear unticks them all.
For example, 4 sources and 3 sizes make 12 images. The aspect ratio of each size decides the shape of its crop.
Add a custom size
Open the Custom group at the top of the sidebar.
Type a name, or leave it empty to name the size after its dimensions.
Enter a width and height in pixels, from 1 to 8192. Leave one side empty, or type Auto, to keep each image's proportions.
Click +. The new size is added and ticked.
Auto works out the missing side from each source. A 1600 × Auto size makes a 1400 × 1000 image into 1600 × 1143, and a 900 × 1200 image into 1600 × 2133. Only one side can be Auto. To delete a custom size, click the bin icon next to it.
Preset sizes
Croppy includes 61 sizes in 12 groups, based on each platform's published guidance as of October 2026. Print sizes are at 300 DPI. Platforms change their specs from time to time, so check their latest guidance for important work.
