Resize images for Amazon

Amazon's main product image must be square. The longest side should be at least 1000 pixels so the zoom feature works, and 2000 pixels or more is recommended so the zoom is genuinely useful. SelfShot outputs 2000 by 2000 by default and keeps each file under the 10 megabyte limit.

The product should fill about 85 percent of the frame, centered, with the whole item in shot and nothing cropped. SelfShot scales your product to that fill ratio automatically, and you can fine tune it between 80 and 90 percent with the fill slider.

Amazon runs an automated scanner that checks the main image background is pure white, defined as red 255, green 255, blue 255. A background that looks white to your eye but is actually a light gray, such as 250, 250, 250, can be rejected. This is the single most common reason a main image is suppressed.

SelfShot pads your photo onto a pure white square and then checks the result. When the check passes you see a confident badge reading pure white, RGB 255,255,255. When it does not, you see the exact off-white value it found, so you know to fix the shot rather than guess.

The 85 percent rule is Amazon's guidance that the product should occupy roughly 85 percent of the image area. Too small and the product looks lost in white space; too large and it can feel cramped or get cropped. SelfShot centers your product at that ratio so it reads well in search and on the product page.

To be honest about limits: this version creates a white background by padding, which works when your product is photographed on a white sweep or in a lightbox. It does not automatically cut a product out of a busy background. If your photo has a cluttered background, reshoot on white or cut the product out in another tool first, then bring it here to size and verify the white.