Keyframe.it — 2D Skeletal Animation for Game-Ready Sprites
Keyframe.it is a free, browser-based 2D skeletal animation editor. You rig your
artwork with bones, deform it with weighted meshes, animate it on a keyframe timeline, and export
straight to pixi-spine — all in the browser, with no install. It's especially suited
to animating slot-machine and game symbols.
What you can do
- Rig characters and symbols with bones (forward kinematics) and inverse kinematics (IK).
- Mesh-deform art with bone weighting/skinning for natural bending and squash & stretch.
- Animate on a keyframe timeline and curve graph editor, with spring physics for secondary motion (tails, hair, cloth).
- AI-assisted rigging from an image and AI-assisted animation from a plain text description.
- One-click slot-symbol animation pack — generate idle, win, drop and destroy clips at once.
- Import & export Spine bundles (.json + .atlas + .png) for pixi-spine and other Spine runtimes; also export GIF, sprite sheet and video; import PSD layers as parts.
Who it's for
Game developers, slot/casino-game artists, and 2D animators who want a fast, free,
browser-based alternative to Spine for rigging and animating sprites and exporting to game
engines via pixi-spine. Try a live demo:
rigged monkey character ·
cat character ·
slot symbol.
Frequently asked questions
Is Keyframe.it free? Yes — it's free to use in your browser.
Does it export to Spine / pixi-spine? Yes — it exports Spine-compatible bundles and can import existing Spine exports.
Do I need to install anything? No — it runs entirely in a modern web browser.
Open Keyframe.it (requires JavaScript enabled).