Image Padding Generator

How to use

1. 1Drop a PNG, JPG, WebP, BMP, or GIF, or click the upload area to choose a file.
2. 2Pick a padding mode: Uniform for the same pixels on every side, Per side for independent top/right/bottom/left, or Pad to aspect ratio for square, 4:5, 9:16, 16:9, or other targets.
3. 3Choose a padding color from the presets, the color picker, or a hex value. Toggle Transparent padding if you want a see-through border (PNG or WebP output only).
4. 4Pick an output format and quality, then click Add padding. Preview the result and click Download.

About this tool

Image Padding Generator extends the canvas around your image with a colored or transparent border. Three modes cover the common jobs: Uniform adds the same pixel padding on all four sides for a clean photo frame look. Per side sets the top, right, bottom, and left padding independently for asymmetric framing or letterboxing a single edge. Pad to aspect ratio resizes the canvas (not the image) until it matches a target ratio like 1:1 for Instagram squares, 4:5 for vertical posts, 9:16 for Stories, Reels, or Shorts, 16:9 for YouTube thumbnails, 3:2 or 2:3 for DSLR prints, and 1200 x 630 for Open Graph cards. In aspect mode you can anchor the image to any of the nine standard positions inside the new canvas. The padding fill is either a freely chosen hex color (with white, black, polaroid cream, and other one-click presets) or fully transparent, which is preserved in PNG and WebP output. JPG output has no alpha channel, so transparent padding falls back to the chosen solid color automatically. Output keeps the source format by default or switches to PNG, JPG, or WebP with a quality slider for the lossy formats. Everything runs on a local HTML5 canvas: the image is decoded, drawn onto a larger canvas behind a colored fill, and encoded with the browser's native encoder. Source pixels, padding color, and rendered output never leave your device.

Free to use. Works in your browser. No signup, no login.