Spark Sheet — Sprite Effect Exporter

Preview and download four free PNG sprite sheets with JSON before buying the editable generator.

Generate small 2D effects for your game prototype. Four procedural presets: particle burst, expanding ring, star sparkle and comet trail. Control seed, color, frame size, frame count, columns and playback FPS; download transparent PNG sprite sheets and matching JSON frame rectangles/durations. Includes the offline HTML/CSS/JavaScript tool, editable source and README.

32/64/128-pixel frames; 8/16/24/32 frames; 4/8 columns; integer 1–60 FPS. Checkerboard preview is excluded from PNG exports. Changes apply when Generate succeeds. One-shot effects fade; trail visibly restarts.

AI-assisted original procedural code and documentation; no third-party artwork. Personal/commercial project incorporation permitted, attribution optional; whole-pack resale excluded. No engine integration or mobile support promised. Tested in Codex desktop browser; other browsers/engines unverified.

Unzip and open index.html in a current desktop browser. No installer, dependencies or network connection required.