ImageOptim
Free open-source Mac app that shrinks image files and strips private metadata with drag and drop.
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- 4 of 4
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About ImageOptim
ImageOptim is a long-standing Mac utility for making images smaller before you publish or ship them. Drag JPEG, PNG, GIF or SVG files onto its window or Dock icon and it runs several optimisers in turn (MozJPEG, pngquant, Pngcrush, Zopfli, SVGO and others), keeps whichever result is smallest, and overwrites the file. By default it is lossless, so images look identical; turning on lossy minification gives much bigger savings in exchange for a small quality change. It also removes EXIF data such as GPS position and camera serial numbers, which is useful for privacy. It integrates with Finder services and can be run from the command line. The Mac app is free and open source under the GPL v2 and is deliberately not sold in the Mac App Store; a separate paid web API exists for servers. It needs macOS 11 or later. It suits web developers, designers and app developers who want a simple, reliable compressor.
Best for: Mac users who want a free drag-and-drop compressor for web and app images.
Pros and cons
What works
- Free and open source, with no limits on files
- Combines several best-in-class optimisers automatically
- Strips GPS and camera metadata for privacy
Why people leave
- Mac only
- Can be slow on large PNGs with Zopfli and PNGOUT enabled
- No WebP or AVIF conversion in the Mac app
Top ImageOptim alternatives
See all 2- 1
Caesium Image Compressor62.6Free, open-source batch compressor for Windows and Mac with a real-time preview and folder support.
- 2
Clop40.0Optimises automatically on copy and in watched folders, and also handles video, PDFs and audio.
Why people left ImageOptim
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ImageOptim: common questions
Is ImageOptim free?
Yes. ImageOptim is free, open-source software.
Is ImageOptim open source?
Yes. The source code is on GitHub at ImageOptim/ImageOptim.
What platforms does ImageOptim run on?
ImageOptim is available for macOS.
What are the best alternatives to ImageOptim?
The highest-ranked ImageOptim alternatives right now are Caesium Image Compressor and Clop. See the full ranked list for pricing, platforms and verified facts.