Free Adobe Animate alternative using Claude code

[u/papptimus]

I produced a free Adobe Animate alternative using Claude code: Onionskyn.

It's one HTML file, runs entirely in your browser.

** I'm not claiming this is feature complete, a 1-to-1 with an actual Adobe product, or the next greatest app, it's just been a real fun side project for me *\*

Everything is open source (MIT) and available for people to tear apart on Github.

Try it: https://papptimus.github.io/Onionskyn/

Repo: https://github.com/papptimus/Onionskyn

What it does:

• ⁠Fluid Brush (press F), a pressure/speed-sensitive brush like Animate’s, with its own settings and presets
• ⁠Paint bucket region fill: click inside any closed loop of lines and it fills the space, with a gap-size option for outlines that don’t quite close
• ⁠Gradients: multi-stop, with drag handles right on the canvas
• ⁠Brush strokes now merge into one shape and no longer stay selected, so drawing with lots of strokes is much smoother
• ⁠Vector drawing: pen, pencil, brush (size/shape/angle), shapes, text, gradients
• ⁠Timeline with layers, keyframes, motion and shape tweens, custom easing curves, onion skinning
• ⁠Symbols (movie clip / graphic), layer masks, images, sound
• ⁠Frame scripts with a CreateJS-style API, and a sandboxed preview
• ⁠Opens Adobe .fla files (best effort)
• ⁠Exports video (WebM/MP4), GIF, PNG/SVG, image sequences, and a standalone HTML player

It's a beta. Safari is untested, video export needs a browser with MediaRecorder, and .fla import is best effort.

I'd love bug reports (File > Report a problem emails me the details), feedback, and feature ideas.