TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Simple Image Resizer - Simple Image Resizer is free, online and powerful image resizer. Resize your images, photos, scanned documents without losing quality and in a easy way!
Image Compressor by RedKetchup - Compress the file size of a PNG, JPEG, WEBP, or HEIC image online. Reduce the image dimensions based on KB or MB. Improve the quality of PNG compression with dithering.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
TinyJPG - Compress JPEG images with perfect quality and file size
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.