RIOT - Radical Image Optimization Tool Alternatives for Linux

XnConvert is a robust and free cross-platform batch image processing tool designed to handle multiple image manipulation tasks at once. It supports over 500 file formats and allows users to combine more than 80 distinct actions, making it an indispensable asset for photographers, graphic designers, and anyone requiring efficient bulk image editing.

FileOptimizer is a robust utility for lossless file size reduction, supporting a vast array of formats including popular image, document, and archive types. It leverages various optimization techniques to shrink files without compromising quality, and supports batch processing for efficient workflow.