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ImageOptim is a front-end (GUI) for set of tools for optimisation of PNG and JPEG images.

Optimisation makes files smaller (in terms of disk space) by finding optimal compression parameters and by removing unneccessary information, like file comments, EXIF tags and color profiles.

What's New

Version 1.7.1:

Note: Now requires OS X 10.9 or later.

  • Added experimental Guetzli optimizer
    • It's off by default (enable in Preferences), because it's very slow: 1 minute + 200MB RAM per megapixel; it is normal for a large photo to take 10 minutes and gigabytes of memory
    • It's ineffective on JPEGs with quality 85 or lower; it's best to create JPEGs with


  • OS X 10.9 or later
  • Full functionality requires OS X 10.10 or later

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4.7 40


Current Version (1.x)


Downloads 55,270
Version Downloads 814
License Free
Date 17 Jul 2017
Platform Intel 64 / OS X
Price Free
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