Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Resizing.app - Image resizing has never been so simple with free online resizing.app. Convert, optimize, resize images with ease and for absolutely free.
WebUtils Image Compress - Compress or convert images on the web with offline support. Images are not uploaded on server and processed on client with webassembly. Support for formats like JPEG, PNG, WebP, AVIF and JXL
Image Resizer for Windows - Lets you resize images by right-clicking.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Icecream Image Resizer - Image resizer by Icecream Apps is a program to resize images fast and free. Windows version. Free Download.