Smart Resize

Optional extra instruction that is forwarded to nano-banana-pro alongside the auto-generated resize prompt. Leave empty to let the model preserve the original image content as closely as possible.

The URL of the source image to resize.

The list of target dimensions to generate, each written as ``<width>x<height>`` (e.g. ``"1920x1080"``). One output image is produced per target size (multiplied by ``num_images_per_size``). The endpoint internally picks the smallest nano-banana-pro preset that fully covers each target so the final image is a pixel-perfect match with no upscaling.