Apps similar to RIOT - Radical Image Optimization Tool include Caesium Image Compressor, which is free and open source. Other options are XnConvert, FileOptimizer, Dinky and ImageOptim. Image Optimizers like RIOT - Radical Image Optimization Tool are a crowded field, with more than 100 alternatives for Windows, Mac, the web, Linux and Android.
Caesium Image Compressor lets you compress your pictures up to 90% without visible quality loss. Providing a simple yet effective interface with a real-time preview and multiple image processing at the same time, everyone will be able to reach the best result.
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XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux.
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FileOptimizer is a lossless file size optimizer supporting AIR, APK, APNG APPX, BMP, CBZ, DOCX, DLL, EPUB, EXE, GIF, GZ, ICO, JAR, JPEG, MNG, MP3, MPP, PNG, PPTX, ODT, OGG, OGV, PDF, PUB, SCR, SWF, TIF, VSD, WEBP, XAP, XLSX, and ZIP file formats among others.
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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.
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ImageOptim is excellent for publishing images on the web (easily shrinks images “Saved for Web” in Photoshop). It's useful for making Mac and iPhone/iPad applications smaller (if you configure Xcode to allow better optimization).
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Compress and compare images with different codecs, right in your browser.
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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.
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Desktop app for offline batch compression and conversion supporting over 100 formats, including images, videos, GIFs, and PDFs. Features drag-and-drop, reusable presets, folder monitoring, preview, trimming, clipboard compression, context menu, shortcuts, and automation.
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Compress images, videos, and PDFs directly on your Mac with local batch processing, no internet required, and full privacy. Features drag-and-drop workflow, smart quality preservation, on-device optimization, and subscription options for premium tools.
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Native macOS image compression for JPEG, PNG, WebP, and AVIF, with batch processing, AI upscaling, and background removal.
United States
Using advanced lossy compression, TinyPNG reduces PNG file sizes by 50-80%, preserving full transparency and minimizing quality loss. Ideal for web designers, it increases website speed, saves bandwidth, and offers tools like a Photoshop plugin and API for seamless integration.
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