The Story Behind Sprite Smithy

The GDevelop Struggle

I built Sprite Smithy because I'm a game developer—and I use GDevelop. Like a lot of indie devs, I wanted to turn AI-generated character videos into usable sprite sheets without paying for expensive, bloated software. The options were either subscription tools that felt like overkill, or manual frame-by-frame work in an image editor. Neither fit: I needed something fast, deterministic, and tuned for the kind of sprite-smithing that actually matters in a game engine.

The frustration was real: wanting to go from "video of a character" to "clean sprite sheet I can drop into GDevelop" without guesswork, watermarks, or a credit card. So I built the tool I wished existed.

Building a Better Anvil

The "smithing" of a sprite isn't just cropping frames. It's about deterministic processing: same video in, same sprite sheet out, every time. No random compression or alignment drift. You need chroma keying that actually removes green screen (or whatever background you used) without leaving halos or inconsistent edges. And you need frame-perfect looping so the first and last frame line up—otherwise your run or idle animation stutters in-engine.

I used my dev experience to automate the tedious parts: alignment, background removal, halo cleanup, and loop selection. The result is a workflow that respects what game devs actually need: predictable output, control over the loop range, and exports that drop straight into a project.

Our Philosophy

Free. No tiers, no paywall, no "export limit." If you find it useful, use it.

Browser-based. You don't install anything. Open the tool, load your video, and go.

Privacy-first. This is non-negotiable. All processing happens in your browser using the Canvas API. Your videos are never uploaded to our servers—or anyone else's. What runs on your machine stays on your machine. We don't store your footage, and you don't need an account to use the tool.

No corporate speak, no upsells. Just a tool built by someone who had the same problem you might have—and who wanted to fix it for the community. That's me, John Adams, from Looxahoma, MS, and my company Lefty Studios.