PixExtender

PixExtender uncrops a photo by generating new background around it, so the image fits a platform's size or aspect ratio while the original pixels stay untouched. Sellers and social media managers use it to meet marketplace and ad specs.

Pick a platform preset or enter custom dimensions up to 4096 by 4096 pixels, and the model matches lighting, texture and depth at the edges. A batch mode applies one ratio and setting to 20 images at once for product sets.

The same site offers an image upscaler, photo enhancer, photo restoration and an image enlarger. Paid plans remove the watermark and include a commercial license.