ImageOptim
Reduce image file sizes through a desktop interface for established optimizers.GetGPL-2.0+
Crunch
A drag-and-drop PNG optimizer that combines pngquant and zopflipng to shrink image files.
MIT AND GPL-3.0 AND Apache-2.0 · Downloads from github.com
- License
- MIT AND GPL-3.0 AND Apache-2.0
- Open source
- Source
- GitHub
- chrissimpkins
- Verified
- 2026
About Crunch
Crunch reduces the size of PNG files by running them through lossy palette quantization with pngquant and then lossless recompression with zopflipng. Drop images on its window and it writes optimized copies; the project also provides a Finder right-click service and a crunch command-line tool that use the same pipeline.
It trades speed for smaller files, so large batches can take a while. Crunch's own code is MIT licensed, while the bundled pngquant (GPL-3.0) and zopflipng (Apache-2.0) keep their licenses, all recorded in the project's LICENSE.md. The last release, 5.0.0, was published in June 2022 as a disk image on GitHub.
Information
- Source code
- chrissimpkins/Crunch
- Website
- github.com
- Download
- github.com
- Category
- Design
- Evidence checked
- Tags
Maco links to each project’s official download. Check its release notes for macOS version and Apple silicon support. The verification date records our license and source review, not a security audit.
Sources and image credits
- github.com/chrissimpkins/Crunch
- github.com/chrissimpkins/Crunch/blob/master/LICENSE.md
- github.com/chrissimpkins/Crunch/releases
- github.com/chrissimpkins/Crunch/blob/master/docs/MACOSGUI.md
- icon.png: Christopher Simpkins; adapted from the "Audacity Icon" by Evin (xillra). CC BY 3.0 per the Crunch LICENSE.md application icon notice.
License and artwork notices
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