Sites and apps similar to ImgBoost include ImageOptim, which is open source and free for personal use. Other options are RasterFox, TinyPNG, TinyJPG and Kraken Web Optimizer. In total there are six Image Optimizers like ImgBoost for Mac and self-hosting.
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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Native macOS image compression for JPEG, PNG, WebP, and AVIF, with batch processing, AI upscaling, and background removal.
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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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TinyJPG reduces the file size of your JPEG images. Every uploaded image is analyzed to apply the best possible JPEG encoding. Based on the content of your image an optimal strategy is chosen.
With Image Optimizer you can losslessly optimize your PNG, JPEG and GIF files and thus save your bandwidth and your users' time! Kraken recompresses images with blazing speed and strips metadata with image quality intact.
Thumbrella brings fast, beautiful thumbnails to any online gallery. Supporting 100+ formats: photos, video, documents, 3D models, and other media.
