Apps similar to GraphicsMagick include ImageMagick, which is free and open source. Other options are Dinky, XnConvert, OptiImage and RasterFox. Image Converters like GraphicsMagick are a crowded field, with more than 25 alternatives for Windows, Mac, Linux, the web and self-hosting.
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
United States
Free macOS tool for compressing images, videos, and PDFs—just drag and drop to support numerous formats, flatten or rewrite PDFs, remove metadata, set size targets, preserve quality, and save compressed files alongside originals without internet required.
United States
XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.
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Optimize PNG, JPEG, WebP, and SVG images efficiently with flexible lossless and lossy compression modes, metadata control, and safe mode to avoid data loss, using tools like oxipng, jpegoptim, scour, and cwebp, enhancing image storage and load efficiency.
GermanyEU
Native macOS image compression for JPEG, PNG, WebP, and AVIF, with batch processing, AI upscaling, and background removal.
United States
Switcheroo is designed to give you a simple, quick, and easy-to-use tool to convert and manipulate your images in whatever way you like. It is built on top of the most advanced image editing libraries, ImageMagick.
United States
G'MIC is a full-featured open-source framework for image processing, distributed under the CeCILL free software licenses (LGPL-like and/or GPL-compatible). It provides several different user interfaces to convert / manipulate / filter / visualize generic image datasets...
Offers lossless image compression and batch processing with full control for JPEG, PNG, GIF, WebP, SVG, and modern formats on Mac. Fully offline, never uploads files—drag, drop, automate with folders, convert formats, strip metadata, and use reusable custom profiles.
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Converseen is a free cross-platform batch image processor for Windows and Linux that allows you to convert, resize, rotate and flip an infinite number of images with a mouse click.
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Batch process photos with resizing, cropping, color adjustments, text or watermark overlays, preview changes before saving, automate renaming with custom patterns, support for major formats, folder structures, preset settings, and drag-and-drop management.
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RomaniaEU
Image Tuner is a free batch image resizing, renaming, conversion and watermarking software with a super-intuitive and straightforward interface.
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