Pingo is a free PNG and JPEG optimizer which supports both lossless and lossy compression. There are plenty of similar tools around, but pingo stands out from the competition in several ways -- some good, some not. The program is a compact 521KB download, unpacking to a single executable which you must run from the command line. Syntax is straightforward. At a minimum, you can just point the program at your files and have it optimize them automatically, like this: pingo picture.png pingo *.jpg This simplicity could be a problem as pingo automatically overwrites your source files with the optimized…
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