Apps similar to ImageOptim include ImageMagick, which is free and open source. Other options are Caesium Image Compressor, Dinky, FileOptimizer and OptiImage. Image Optimizers like ImageOptim are a crowded field, with more than 100 alternatives for Windows, the web, Mac, Linux and Android.
LocallyTools is a free local toolbox, offering various practical tools such as image compression, PDF processing, developer tools, etc. 100% local processing, zero upload, zero risk, fully protecting privacy and security. Supports offline use, no registration required.
Finder extension for Mac: right-click a file to convert, compress, resize, remove its background, merge PDFs or share it as a link. Runs on your Mac; only sharing goes online.
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SciZone is an intelligently engineered media optimization tool designed for speed, quality, and absolute privacy. Unlike traditional online converters that upload your sensitive images to a server, SciZone uses advanced WebAssembly and multi-threading technology to process...
Image Magic is an all-in-one online image editing and conversion platform that helps you resize, compress, crop, convert, watermark, image to pdf and self attest images instantly. Fast, secure, and easy to use no software installation needed.
Smolr is a small tool that let you convert and optimize your image files to make them smaller and more usable.
Convert & Compress is a native Mac utility designed to be the last image converter you'll ever need. Convert, resize, crop, compare, and adjust quality settings across 20+ image formats with batch processing. The clean, native and private image converter for Mac.
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CompressBetter is a free online JPEG/JPG image compressor that utilizes Google's cutting-edge JPEGLI library. This technology enables superior image quality and significant file size reduction, often achieving 30-50% smaller JPEGs with visually identical quality, and...
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Compress JPG, JPEG, PNG, WebP, GIF, AVIF, JXL, and QOI formats online for free. No sign-up needed. Secure in-browser compression handles up to 1000 files simultaneously. Your files never leave your device, ensuring complete privacy.
ShrinkFox by Chovexa is a privacy-first, client-side web utility engineered to compress JPG, PNG, WebP, and PDF documents down to exact target file sizes (such as <50KB, <100KB, or custom thresholds) with zero server uploads.
Instantly compress JPEG images in your browser without uploads or downloads, maintaining privacy and security. Features customizable quality, batch processing, real-time previews, unlimited size support, an intuitive interface, and is completely free to use.
FotoLince is a powerful, free online tool for optimizing images without uploading them to a server. Powered by WebAssembly, it processes everything locally on your device, ensuring 100% privacy and speed.
Minime is a free and open-source desktop image compressor and format converter for Windows, macOS, and Linux. Built in Rust, it focuses on lossless image optimization while keeping everything private and local to your device.
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