preface
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Brief introduction:
ImageOptim is a small, free and open source optimization tool for lossless compression of Mac images. By default, the compression is said to be “lossless”, meaning the image quality is not changed, but the size can be reduced.
The tutorial
ImageOptim supports PNG, JPG, GIF image compression optimization, you just need to drag and drop the file on its interface to complete optimization (PS: after processing will cover the original image/the original image is moved to the trash can, manual recovery), support batch, very easy to use.
Effect comparison:
Download address:
The official download