Sprite Sheet Cutter

Game artists pack animation frames and icons into one sprite sheet, but engines, editors and GIF makers often need the frames as separate files. This cutter splits a sheet by rows and columns, by an exact cell size with margin and spacing, or automatically by finding the empty gaps between sprites. It can skip empty cells, trim each sprite tight, name the files in order and make an animated GIF preview — all in your browser.

How to use this tool

1. Choose the sprite sheet (PNG with transparency works best).
2. Pick how to cut: rows and columns, the cell size in pixels (with margin and spacing), or automatic.
3. Choose whether to skip empty cells and trim the frames, and set the file name prefix.
4. Download the frames as a ZIP, and the GIF preview if you made one.

Formula

cell width = ⌊(sheet width − 2 × margin − (columns − 1) × spacing) ÷ columns⌋; with a fixed cell size, columns = ⌊(sheet width − 2 × margin + spacing) ÷ (cell width + spacing)⌋

Heights work the same way. A cell is empty when all its pixels are transparent (alpha ≤ 8), or — on a sheet without transparency — all within 10 levels of the top-left pixel's colour. Automatic mode finds bands of rows that contain something, then splits each band at fully empty columns and trims each piece. Pixels are copied exactly, without resampling.

Example

A 512 × 256 sheet with 8 columns and 4 rows gives 512 ÷ 8 = 64 × 64 px frames, 32 in total, named sprite_00.png to sprite_31.png. With a 2 px margin and 2 px spacing the cells become ⌊(512 − 4 − 14) ÷ 8⌋ = 61 px wide.