Top Alternatives to GraphicsMagick

PhotoBulk is a powerful yet simple bulk image editor for macOS. It allows users to perform multiple editing operations on hundreds or thousands of images simultaneously, including watermarking, optimization, resizing, and renaming, all through an intuitive drag-and-drop interface.

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.

Phatch is a powerful yet user-friendly batch image processor that simplifies repetitive image editing tasks. Its intuitive drag-and-drop interface and extensive action library make it ideal for photographers, web designers, and anyone needing to process large volumes of images efficiently.

FastStone Photo Resizer is a free batch image converter and renaming tool designed for efficiency. It handles various image formats and offers essential editing functions like resizing, cropping, watermarking, and color adjustments in a batch process.

Image Tuner is a comprehensive free batch image processing tool for Windows, offering effortless resizing, renaming, format conversion, and watermarking of multiple images simultaneously. It supports various image formats and integrates seamlessly with Windows Explorer for convenience.