AutoOutline — Outline Generator for Aseprite

✏️ Perfect Outlines, Zero Effort

AutoOutline adds crisp outlines around your pixel art sprites — outer, inner, or both — with glow and shadow effects built in. One dialog, one click, done.

No more hand-drawing outlines pixel by pixel. No more redoing them when your sprite changes.

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✦ Features

• 3 Outline Types — Outer, Inner, or Both at once
• Adjustable Thickness — 1 to 4 pixels
• 2 Shape Modes — Diamond (4-directional) or Square (8-directional)
• Glow Mode — Fading alpha rings for a soft glow effect
• Shadow Mode — Directional drop shadow with automatic offset
• Any Color — Pick your outline color from Aseprite's color picker
• Live Preview — Toggle preview on/off before committing
• Flexible Targeting — Apply to current frame, all frames, or selected frames
• Layer Control — Output to a new "Outline" layer or replace in place
• All Color Modes — Works with RGB, Indexed, and Grayscale sprites

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✦ How It Works

1. Select your sprite layer in Aseprite
2. Go to Edit → AutoOutline
3. Pick your outline type, color, and thickness
4. Enable Glow or Shadow if you want the effect
5. Toggle Preview to see it live — click Apply when happy

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✦ Outline Modes

Outer	Outline drawn around the outside of your sprite — classic selection-style outline
Inner	Outline drawn inside the sprite edges — great for adding depth
Both	Outer + Inner at the same time for maximum definition
Glow	Fading alpha on each ring — soft neon or magical glow
Shadow	Offset down-right — instant drop shadow for your sprites

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✦ Perfect For

• Game developers who need consistent outlines across all sprites
• Pixel artists adding depth, glow, or shadow effects quickly
• Anyone making characters pop against busy backgrounds
• Batch-outlining entire animations in one click

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✦ Installation

1. Download the .aseprite-extension file
2. Double-click it — Aseprite installs it automatically
3. Find it under Edit → AutoOutline

Requires Aseprite v1.3 or newer.

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✦ What You Get

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AutoOutline.aseprite-extension

Ready-to-install extension file

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Made by Deer Rock Studios

This product may have bugs; we are improving every day and your feedback would help us. That said, we are not responsible for misuse and do not offer refunds.