Hi Product Hunt — I built Sprite Sheet Builder because every sprite-sheet tool I tried either wanted an upload, an install, or an account for something my laptop can do in a canvas. Pack frames into one transparent sheet (grid or auto-pack, with padding/spacing and a 1–30 FPS preview), split an existing sheet back into frames by grid or transparent-region detection, convert GIFs to sheets and back, and export engine-ready metadata: Phaser/TexturePacker JSON, Unity's importer bundle, a Godot `.tres` SpriteFrames resource, and Sparrow XML for the Flixel family. The FNF generator groups actions and writes Sparrow XML plus a Psych Engine character JSON in one ZIP. Everything is client-side — files never leave the browser, and the free path needs no sign-up. There is an AI sprite generator on the roadmap; it is not on sale yet, so today the tool is simply free. Would love feedback from anyone who has fought with atlas metadata by hand.

Sprite Sheet Builder

Free browser sprite sheet maker for game devs

Free browser sprite sheet maker for game devs