VOIDLESS.DEVSprite Outline Generator
Free sprite outline generator. Add an adjustable outline around any transparent PNG sprite — pick the color and thickness — then export the PNG. In-browser, no cost.
Drop a transparent PNG sprite
Works best on a PNG with transparency around the sprite.
Frequently asked questions
How does it add the outline?
It dilates the opaque pixels of your transparent sprite by the chosen thickness and fills the border with your outline color.
Does it need a transparent image?
Yes — a PNG with transparency works best so the outline can wrap the sprite silhouette.
Create game assets with AI
Generate original art, audio, and 3D models in seconds.