Messaging app chat backgrounds vary (sky blue, dark theme, etc.), so a light-colored character without an outline can blend into the background. A white outline keeps the character visible on any background.

Yes — the tool finds the edges of every opaque pixel across the whole sheet and outlines them all in one pass. It finishes in a single operation regardless of how many characters are on it.

Select multiple files at once — each is processed independently. Select a file from the list to view its result large, and download individually or all as a ZIP.

Yes, changing a setting automatically reapplies it to every uploaded file.

Yes, click the ✕ button on each file's thumbnail to remove it individually.

Download the outlined result, then upload it directly to the 'Emoticon Grid Splitter' tool to cut it into individual emoticon files by grid cell.

Yes, you can set the outline to any color you want.

Yes, regardless of exact wording, they all refer to the same feature. This tool draws an outline in white (or any color you choose) around the outside of a character's silhouette.

It's anti-aliased — the actual distance to the nearest character pixel is computed per pixel, so the edge fades smoothly to transparent rather than cutting off abruptly.

Yes — the outline is computed using true circular (Euclidean) distance rather than a square approximation, so it stays a uniform round thickness even around tight curves.

Yes, you can toggle between px and pt next to the thickness field. pt is converted using the web-standard 96dpi (1pt ≈ 1.33px).