PDF guides

Straight answers to the PDF problems people actually get stuck on — each one paired with a free tool that runs entirely on your own device.

How to compress a PDF to 100KB

Hit a strict upload limit by tuning image quality instead of guessing.

Get under Gmail and Outlook attachment caps without losing readability.

Draw and place a signature on any document, privately, in your browser.

Fix sideways scans so the rotation sticks when someone else opens the file.