For JPEG images, lower quality settings reduce file size at the cost of introducing compression artifacts such as blurriness and color banding around sharp edges. For most web uses, a quality setting between 70% and 85% provides a good balance between file size and visual clarity. PNG is a lossless format, so quality settings have less effect on it.

The compressor supports JPEG, PNG, and WebP input formats. The output is saved in the same format as the original file. For the smallest file sizes, consider converting PNG images to WebP or JPEG before compressing, as these formats are designed for lossy compression.