Apps similar to FileOptimizer include Caesium Image Compressor, which is free and open source. Other options are ImageOptim, Dinky, OptiImage and TinyFast. There's no shortage of Image Optimizers like FileOptimizer, with more than 50 alternatives for Windows, Mac, Linux, the web 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.
Italy
EU
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).
PolandEU
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
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
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.
MaltaEU
Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files.
RomaniaEU
Native macOS image compression for JPEG, PNG, WebP, and AVIF, with batch processing, AI upscaling, and background removal.
United States
Cross-platform tool for free, offline video and image compression, batch processing, editing, and format conversion. No ads, signups, or tracking. Drag-and-drop interface, customizable settings, fine-tune audio and video, clipboard support, all powered by FFmpeg.
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.
SpainEU
UPX (Ultimate Packer for eXecutables) achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression.
Image compression software for jpg and png. The compression features lossless as well as lossy settings with a simple and intuitive interface.
