Photo Maximizer is described as 'Usually when you enlarge an image you get pixilation and deterioration of colour and brightness. Photo Maximizer maintains image quality and undesirable noise'. There are five alternatives to Photo Maximizer for Windows and Mac. The best alternative is PhotoZoom Pro. It's not free, so if you're looking for a free alternative, you could try A Sharper Scaling or Reshade. Other great apps like Photo Maximizer are Fotophire Maximizer (Paid) and Stepok Picture Enlarger (Paid).
Reshade offers the highest quality photo enlargement available for your computer. Resize images without the usual blur, jagged edges, halos, loss of sharpness or detail associated with image enlargement.
Picture Enlarger is the professional software from Stepok Image Lab that allows photographers to resize images with ease. Powered by the deep learning technology(AI), it provides outstanding results comparing to traditional resize methods such "bi-cubic".