Top Alternatives to FastStone Photo Resizer

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.

ImageMagick is a powerful, free, and open-source software suite designed for comprehensive manipulation of both raster and vector images. It offers a vast array of tools for displaying, converting, editing, and processing image files, accessible primarily through a compelling command-line interface.

RIOT (Radical Image Optimization Tool) is a lightweight and free image optimizer designed for effortless image compression and batch processing.

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.

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.

Light Image Resizer is a comprehensive yet easy-to-use application for resizing, converting, protecting, and organizing your digital photos and images. It supports batch processing, allowing you to optimize large collections quickly.

Caesium is a powerful and user-friendly image compression software designed to reduce the file size of your images without significantly impacting visual quality. It supports various image formats and offers batch processing capabilities for efficient workflows.

Kigo Image Converter is a versatile software solution designed for converting, resizing, and watermarking image files in various formats. It offers robust batch processing capabilities, allowing users to efficiently manage large volumes of images with ease.

GraphicsMagick is a powerful and efficient open-source software suite for image processing. Designed for command-line use and integration into scripts and applications, it provides a comprehensive set of tools for manipulating, converting, and performing various operations on image files in numerous formats.

ImBatch is a robust and free batch image processing tool for Windows. It allows users to apply multiple image editing tasks simultaneously to large collections of photos, streamlining workflows and saving significant time.