About Sprite Tools
Your game art never leaves your device.
Built for game animation
Drop a walk cycle as numbered PNGs (or a GIF). We pack a uniform strip or grid so each frame occupies the same cell — that is what Phaser, Unity, and Godot expect so the character does not hop between frames. Filename prefixes (walk_, idle_) become animation clips you can preview at FPS.
No upload
Decoding, trim, packing, and JSON export all run in this tab. There is no backend and no /api. The only files that exist after you leave are the ones you chose to download.
Backgrounds
This MVP packs pixels you already have. For photos that still have a studio backdrop, cut them out first (for example Cutout at cutout.sw-commercial.com), then drop the transparent PNGs here. An optional on-device cutout pass can land in a later Pro phase.