Sprite Gen

Sprite Gen is a Python command line tool and skill that converts single images into clean 2D game sprite atlases and transparent motion loops.

Sprite Gen is a Python command line tool and skill that generates 2D game sprites and animation atlases. It takes a single base image and drives generation row by row to lock character identity, strip chroma backgrounds into real alpha, extract clean transparent frames, and bake runtime atlases with machine-readable manifests. It also turns stills into transparent video loops through an integrated pipeline. A curation webview lets users compare, reject, nudge, and preview loops live before export. The tool is designed for game developers and artists who need production-ready sprite sheets instead of unstable AI generations.

Sprite Gen at a glance

Best for: Designer, Software engineer
Runs on: Python CLI, API, Web
Pricing: Free and open source under Apache-2.0
Released: May 2026
Category: AI image tool
Website: github.com/aldegad/sprite-gen

Key features

Generate row-by-row sprite atlases from a single image
Extract transparent frames with real alpha cleanup
Produce runtime manifests with absolute frame rectangles and fps
Convert video inputs into transparent motion loops
Provide a curation webview to review and edit frames
Export to Aseprite, Phaser, and Flame engines
Apply deterministic colorways using a palette map
Build repeating backgrounds and project foot shadows

Use it for

Generating 2D game character sprite sheets
Converting video animations into transparent loops
Cleaning up chroma backgrounds into real alpha channels
Composing game scenes with placed assets and shadows

Alternatives to Sprite Gen

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Claude Pxl — Generates PNGs, sprite sheets, animated GIFs, and live previews from code.
Snowpixel — Generates video, music, images, and 3D objects in one studio.
Segmentit — Converts everyday 2D photos into 3D objects with distinct silhouettes and details.
GPT Image 2 Skill — It provides ready-to-use prompt libraries and agent skills for OpenAI image models.

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