Why is the PNG-logo graphic linked to a JPEG image?
If there’s one concept you should take away from this site, it’s Use the best tool for the job. In this case, that happens to be JPEG, which, at 76,563 bytes, is almost seven times smaller than the completely lossless PNG version (515,894 bytes). (Of course, the PNG image is interlaced, which tends to reduce its compression efficiency; non-interlaced, it would be 410,545 bytes, only 5.4 times as large as the JPEG. By contrast, progressive JPEG–which corresponds to PNG interlacing–tends to shrink normal JPEGs, in this case to 71,110 bytes.) See the Basic Introduction for more tips about what to use when, and why.
