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ImageOptim
ImageOptim reduces image file sizes for web use and to save disk space.
About ImageOptim
ImageOptim is a Mac application that reduces image file sizes for web use and to save disk space. Users drag images into its window, and the app runs several optimization tools, including MozJPEG, pngquant, Pngcrush, 7zip, SVGO and Google Zopfli, then keeps the smallest result. The homepage states that the default compression preserves image quality.
The app can also remove embedded data such as GPS position, camera serial number, embedded thumbnails, comments and unnecessary color profiles before images are published. An option keeps metadata if it is needed. Lossy minification is optional and changes image quality in exchange for smaller files. The current version requires macOS 11 or later, and the homepage links to an older version for Mac computers running OS X Yosemite (10.10). The homepage states that ImageOptim is not in the Apple App Store.
Key features
- Drag-and-drop optimization that runs several tools and keeps the smallest file
- Removes EXIF metadata such as GPS position and camera serial number
- Option to keep metadata such as copyright and camera information
- Optional lossy minification for JPEG, SVG, animated GIF and PNG files
- Launch from the Dock icon, Finder Services menu, or Apple Mail Markup menu
- Can be launched from the command line or from Sketch
Best for: Mac users who need to shrink images for websites or remove embedded metadata before publishing images.
Good for
- By default, the homepage states that compression exactly preserves image quality.
- Combines several established image optimization tools in one window.
- The homepage describes the software as free and open-source under GPL v2 or later.
Watch out for
- Lossy minification reduces image quality, though it is off by default.
- The current version requires macOS 11 or later.
- Optimization of PNG files is slow when the PNGOUT and Zopfli tools are enabled.
ImageOptim at a glance
- Website
- imageoptim.com/mac
- Category
- Software & Utilities › Mac Apps
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- iOS, macOS, Web
- Open source
- Not stated
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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ImageOptim FAQ
Can I keep copyright and camera information in my images?
Yes. Uncheck Strip JPEG metadata in Preferences.
How can I make PNG optimization run faster?
In Preferences, uncheck PNGOUT and Zopfli. Optimization runs much quicker without them but is somewhat less effective.
Is ImageOptim available in the App Store?
No. The homepage says Apple's App Store terms do not allow its license, and it warns users about knock-off apps in the App Store.
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