How much can an image compressor reduce file size without losing quality?

A good image compressor can typically reduce file size by 50-80% without any visible quality loss. At 80-85% quality for JPEG images, you can achieve a 50-70% reduction while maintaining virtually identical visual quality. For PNG images, reductions of 30-50% are common at 85% quality. The exact reduction depends on the original image complexity, format, and compression settings. Our free photo compressor uses smart algorithms to find the optimal balance, and you can preview the result before downloading to ensure quality meets your needs. For most web use, staying above 70% quality keeps artifacts invisible while maximizing file size savings.