In this case, TinyJPG performed significantly better than Optimage.

Photoshop 'Save as JPG (high quality)': 1,0 MB.

To see how the Optimage Mac app gets out of a photo compared to Photoshop's 'Save for Web' feature, I downloaded the original-size photo above from the iPhone XS. Test compared to the Photoshop function, HEIC and TinyJPG

In comparison: Photoshop JPEG storage, TinyJPG and Optimage (Photo: Sir Apfelot). TinyJPG has already done good preparatory work. The software had to fit with many photos. I have the feeling that these photos in particular, which have large dark or monochrome areas, could be made smaller by Optimage. In the table you can see that not all images could be compressed better.

ImageOptim offers many setting options and also understands how to optimize nested folders with many photos using drag and drop. Nonetheless, ImageOptim is a recommendation for anyone looking for free Mac software to compress image files. The list always showed 0% for optimization. In my tests, however, it was no longer able to improve the photos that I had previously compressed with TinyPNG/JPG (when I activated 'lossless'). The tool ImageOptim is an image reducer that performed better than TinyPNG in most tests, Short pixels, Imagify.io and other tools provided. The Optimage tool is a Mac app for image optimization and compression of image files. This post here is mainly dedicated to Opimage, because I didn't know this image optimizer and for that reason I tested it with various competitors. Short insertion: The following is about 'Optimage' and 'ImageOptim' - both tools, which unfortunately have a very similar name.

Sir Apfelot recommendation: Clean up your Mac hard drive with CleanMyMac Risk of confusion: Optimage and ImageOptim

Best image compression software for mac