It cuts one picture into several, three ways:
- A grid of rows and columns, for a 3 × 3 profile grid, a puzzle, a printable poster in parts or sprites.
- Carousel slides for a seamless Instagram swipe: square 1:1, portrait 4:5 or landscape 1.91:1 slides that join exactly at the edges when people swipe.
- Tiles of a fixed size (say 512 × 512 px), for maps, texture atlases and upload limits.
The preview draws every cut line on the picture and numbers the pieces in the order they will be saved, so you can see before downloading whether a seam runs through a face or a word. Download everything as one ZIP in PNG, JPG or WebP, or any single piece. The picture is cut in your browser and never uploaded.
Exact pixels when the size does not divide
A 1000-pixel-wide picture does not split into three equal columns. Many tools make the first pieces 333 px and the last one 334, or quietly scale the picture. Here the cuts are placed at the nearest whole pixel to each exact third (0, 333, 667, 1000), so the pieces are 333, 334 and 333 px: the extra pixels are spread out, every pixel of the original is used once and only once, and nothing is resampled. The tool tells you when this happens and by how much.
Seamless carousels
A carousel of three 4:5 slides needs a picture shaped 3 × 0.8 = 2.4 : 1. A typical phone panorama is wider or narrower than that, so something has to give. The tool never stretches: it takes the largest rectangle of the right shape and lets you slide it along the picture with the crop position control, so you can keep the subject inside and let the less important end go. It says how much of the picture is left out. With "Scale each slide to 1080 px" on, every slide is saved at the size Instagram displays (1080 × 1080, 1080 × 1350 or 1080 × 566), so the app does not resize it again.
"Fit to the picture" picks the number of slides that wastes the least: a 6000 × 2000 panorama makes exactly three square slides, or four 4:5 slides with a little trimmed. Up to 20 slides are allowed. The article on splitting for Instagram explains how to keep faces and text away from the seams.
