Free Mac software for PNG and JPEG fast optimization

ImageOptim for Mac
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ImageOptim 1.6.0

  -  1.55 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of ImageOptim 1.6.0.


For those interested in downloading the most recent release of ImageOptim for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download ImageOptim 1.6.0
Why is this app published on FileHorse? (More info)

  • ImageOptim 1.6.0 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    ImageOptim 1.6.0 Screenshot 1
  • ImageOptim 1.6.0 Screenshot 2
  • ImageOptim 1.6.0 Screenshot 3

What's new in this version:

- Switched from jpegrescan to MozJPEG
- Add ability to temporarily enable lossy pngquant and MozJPEG re-encoding. The setting will switch itself off every time ImageOptim restarts
- Added an App Extension that adds ImageOptimze option to images inside Apple Mail compose window (macOS 10.10+ only)
- Fix for erroneous claim that files have already been optimized
- Faster default settings for Macbook Air and older Macs
- Fixed QuickLook animation on Yosemite
- Gratuitous translucency in Yosemite
- Updated translations and fixed help files

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