Idle Motion Maker for Aseprite

Need idle animations for twenty enemies and NPCs and no time to draw them? Pick a preset, press Generate: Idle Motion Maker turns the sprite you already drew into a looping idle animation using only its own pixels (no blur, no new colours), tagged idle.

• Breathe: body stretched/squashed in whole pixels, feet stay fixed
• Bob and Hover: integer-pixel up/down movement (Hover adds a 1 px drift)
• Sway: rows above an anchor shift sideways, tips move more - for hair, plants, banners
• 4, 6, 8 or 12 frames, frame time, amplitude 1-8 px, Sine or Snappy easing; four one-click presets
• Anchor row automatic (the feet) or set by hand; active layer only or all visible layers
• Loop-safe: frame 1 is your untouched sprite and the sequence is periodic; new frames are tagged idle; one Ctrl+Z undoes everything
• RGB, indexed and grayscale sprites, Aseprite 1.3+

Tested in real Aseprite 1.3.18 (headless) on RGB, indexed and grayscale sprites, odd and even sizes and multi-layer sprites: output uses only the colours already in your sprite, deterministic, one undo step.

Not included: a live preview in the dialog (undo and re-run instead), and rotation or squash on single limbs. Results are clipped at the canvas edge, so leave a few empty pixels above the sprite. It is meant for hard-edged pixel art.

Commercial use of the resulting artwork is allowed; no credit needed.

Try the free Lite version first: Idle Motion Maker Lite.

More Aseprite tools by the same author: Smear & Squash Studio, Selective Outline Studio, Pixel Sky & Cloud Generator.

Disclosure: the code was written with an AI coding assistant; the effects are plain pixel maths, no image AI.