If you need to compress a PDF, it helps to know why it’s huge. It’s almost always because of images. Scanned pages are full-page photos, and pictures pasted into a document often stay at full camera resolution. What actually shrinks a file: Compressing the images inside it. For something read on a screen, you don’t need print quality. Removing pages nobody needs, like the blank backs of double-sided scans. Rescanning in grayscale if it’s just text. What barely helps: zipping the PDF. The contents are usually already compressed. One thing to check after compressing: zoom into the smallest text and any signature. If those still look sharp, you’re good.   submitted by   /u/PDFFly   to   r/PDFFlyTools [link]   [comments]