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Image Outline

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Image Outline lets you add a colored outline around the alpha silhouette of a transparent image. Choose a photo to begin.

Method and calculation

Add a colored outline around the alpha silhouette of a transparent image.

Inputs and settings

Image Outline accepts Outline width (pixels) (minimum 1, maximum 30); Outline color.

Worked example

Image Outline example — Outline width (pixels): 6; Outline color: "#0055ff". Preview instructions: Select a still photo, then use Outline width (pixels): 6; Outline color: "#0055ff". The result is a PNG with add a colored outline around the alpha silhouette of a transparent image.

Output and limitations

Use a transparent cutout to outline a person, sticker or logo. An opaque rectangular source receives a rectangular border because alpha, rather than object recognition, defines the silhouette. The enlarged canvas leaves room for the stroke outside the source bounds.

Technical references: Canvas pixel manipulation

Image Outline FAQs

Image Outline applies the following rule to your input: Add a colored outline around the alpha silhouette of a transparent image. The visible preview shows the resulting image effect.
Image Outline has these boundaries: Processes one still image locally. PNG export uses a maximum 4096-pixel source edge; effects may expand the canvas. Start by checking the outline width (pixels) field against the units or format shown.
Image Outline provides this sample: Select a still photo, then use Outline width (pixels): 6; Outline color: "#0055ff". The result is a PNG with add a colored outline around the alpha silhouette of a transparent image.. The preview can be inspected before saving.

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