Thread: 18MB EPUB converts to 40MB Mobi! What can I do to reduce Mobi file size?
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Old 08-17-2011, 10:17 PM   #5
kovidgoyal
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All images in MOBI files are stored as JPEGs. For certain classes of image, jpegs are much larger than PNGs. Various MOBI renderers have various problems trying to render PNG images.
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