pngquant is a command-line utility and a library for lossy compression of PNG images.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
ImageOptim is described as '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)' and is a popular Image Optimizer in the photos & graphics category. There are more than 100 alternatives to ImageOptim for a variety of platforms, including Windows, Web-based, Mac, Linux and SaaS apps. The best ImageOptim alternative is ImageMagick, which is both free and Open Source. Other great apps like ImageOptim are Caesium Image Compressor, Dinky, FileOptimizer and OptiImage.
pngquant is a command-line utility and a library for lossy compression of PNG images.
OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections.
iLoveIMG is an online service to work with images completely free and easy to use. Compress images, resize, crop, convert and much more!.

Experimental, fast Web PNG/JPG optimizer which offer lossless, visually lossless or lossy compression. it performs image reductions over iterations thanks to recursive multi-processing and multithreading systems.

ShortPixel is arguably the top WordPress image optimization plugin: simple to set up, it can automatically optimize both your old and new images, as well as PDF files.




GraphicsMagick is the swiss army knife of image processing. Comprised of 282K physical lines (according to David A. Wheelers SLOCCount) of source code in the base package (or 952K including 3rd party libraries) it provides a robust and efficient collection of tools and libraries...



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.




TrimrPix shrinks image file sizes on your Mac without visible quality loss. Supports JPEG, PNG, GIF, WebP, AVIF, and HEIC. Drag, drop, done — fully offline, no subscriptions.



Oxipng is a multithreaded lossless PNG compression optimizer in Rust. It can be used via a command-line interface or as a library in other Rust programs.
Unlock the true potential of your Webflow sites with Optily - the ultimate time-saving solution that effortlessly optimizes your CMS images, boosting performance.



Pngcrush is an optimizer for PNG (Portable Network Graphics) files. It can be run from a commandline in an MSDOS window, or from a UNIX or LINUX commandline.


