ShrinkIt takes bloated Adobe-saved graphic PDFs, runs them through Apple’s PDF renderer, and saves them back out, making many of them smaller without any quality loss.
Note, though: it’s not really for long complex PDF documents or bitmap images. It’s generally for simple PDF symbols and glyphs you might use in your apps, where saving space is critical.
Note: Now requires OS X 10.7 or later running on a 64-bit Intel processor
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