Image Margin is a free image tool that runs entirely in your browser — add colored padding to all 4 sides. No upload, no account, no limits.
Add solid or transparent padding around an image. Set each of the four sides independently in pixels — or link them to change all at once — pick any margin color, and download the result as a PNG. Everything runs on the Canvas API in your browser; the image is never uploaded.
Yes. Once the page has loaded nothing further is fetched, so you can disconnect and the preview, the margin controls and the download all keep working.
PNG is lossless and supports the transparent-margin option; JPEG can't hold transparency.
Every calculation happens on this page, in your own browser. Your input is never sent to a server, never logged and never used for training — which also means the tool keeps working when you are offline.