Sprite sheet cutter — slice frames, preview animation and export
Cut a sprite sheet into frames and preview how they move. Keep the frames you need, adjust their order and save a ZIP or a new sheet.
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Check the suggested grid. Detection looks for transparent gaps and can miss touching frames or solid backgrounds. Frames that extend past the sheet edge get transparent padding. Use ZIP for more than 40 frames, or if your browser blocks several individual downloads. Images up to 50 megapixels (about 8000 × 6000). Larger files are refused rather than risking the tab being closed by the browser.
How to use
- Open the sheet. Choose or paste an image, ideally a PNG with transparent gaps between sprites.
- Check the grid. Confirm Frame width, Frame height, Columns and Rows. Match the overlay to the cells, then adjust spacing and margins if needed.
- Choose and order frames. Click frames to include or exclude them. Focus a frame and use Alt with the left or right arrow key to move it earlier or later.
- Preview the movement. Set Frame rate and press Play, or use Step to look at each pose.
- Export the selection. ZIP of frames includes PNGs and JSON metadata. Repack across and Repack down make a new sheet; Animated GIF makes a viewing copy.
Questions
Why did Auto-detect grid choose the wrong size?
It looks for regular transparent gutters. A solid background, touching frames or extra transparent space within each cell can mislead it. Use the source sheet’s known frame dimensions and check the overlay across the whole sheet.
Why does the cut drift farther off along a row?
Check Spacing across: a small gutter error accumulates with each column. If every cell is shifted by the same amount, adjust Margin left or Offset X instead. The corresponding vertical controls fix the same problems down a column.
What does the warning triangle mean?
That frame extends beyond the source image. It exports at the requested frame size with transparent padding outside the sheet. Check whether you entered too many columns or rows before keeping it.
Does the export change the pixels?
PNG frames and repacked sheets copy the decoded pixels without resizing or smoothing, then encode them as new files. They are not byte-identical source files and do not retain all source metadata. GIF reduces colours and does not reliably preserve transparency in this exporter, so keep PNGs for editing.
Why is the GIF speed slightly different?
GIF timing uses hundredths of a second, so some frame rates must be rounded. The Frame rate hint shows the effective GIF rate. Check the actual animation in its intended viewer as playback can vary.
Why is Individual PNGs unavailable for a large selection?
Separate downloads are limited to 40 frames to avoid a flood of browser downloads. Use ZIP of frames for a larger selection.
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