Lossless Image Optimization
Smush.it uses optimization techniques specific to image format to remove unnecessary bytes from image files. It is a “lossless” tool, which means it optimizes the images without changing their look or visual quality. Optimizing images for the web will drastically cut down page loading time.
After Smush.it runs on a web page it reports how many bytes would be saved by optimizing the page’s images and provides a downloadable zip file with the minimized image files. Smush.it is part of YSlow Firefox add-on and can be downloaded here.
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