Crunch
Insanely good PNG image optimization
Crunch launched on March 24, 2018 with 308 votes, #55 of 2,954 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 8 years on.
In plain words
Crunch is a free, open source macOS application that optimizes PNG images using lossy compression techniques. Built on pngquant and zopflipng technology, it reduces file sizes while maintaining visual quality. The tool is designed for designers, photographers, and developers who need efficient image optimization. It installs easily via Homebrew and comes with MIT licensing, making it accessible for both personal and professional use.
written from the facts on this page · September 2026
From the sources
Crunch is a free, open source macOS GUI application that is built on pngquant and zopflipng PNG image optimization. It uses a lossy approach to PNG image optimization. The tool is available through Homebrew as a native macOS application. `$ brew cask install crunch` Image examples + compression ratio analysis available on the Github repository README. MIT license.
Insane(ly slow but wicked good) PNG image optimization - chrissimpkins/Crunch
Does a similar job
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Squash 2 for Mac2016 · realmacsoftware.com · ▲421The easiest way to compress and optimize images for the web
TinyFast2025 · tinyfast.app · ▲319I am a developer. I have been building stuff for the last 13 years. One common challenge in all my projects is compressing assets to make them as small as possible. I used to end up using online compressors, but this has a lot of privacy concerns. So, I finally set down for couple of weeks and built this simple app. I can just drag and drop assets in it and it shrinks them. It currently supports around 25 file types. I built a lot of iOS apps but this is the first time building a macOS app, so any feedback is welcome.
Freshly Squeezed2025 · freshlysqueezed.app · ▲280Batch resize, crop, convert and optimize images for macOS
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