Don't rely on image editing software to resize your podcast artwork for Apple Podcasts. Most designers get it wrong. Ensure your image meets Apple's 1280 x 960 pixel size for iOS and 1400 x 700 for non-iOS devices.

Contrast and color space matter too – avoid overly bright colors, use solid backgrounds, and opt for RGB over CMYK to prevent image degradation on digital displays. Avoid using gradients or effects; your artwork should be legible down to 50%.