Flattening merges form fields, signatures, and comments into one static layer so nothing can be edited afterwards. Learn when e-filing systems demand it and three free ways to flatten a PDF.

Need to edit a PDF but can't change the text? Convert it into a Word document first. This guide covers three free ways to do it: our PDF to Word converter, Microsoft Word, and Google Docs, with honest notes on which one keeps the formatting intact.

Gmail and Outlook cap attachments at 20 to 25 MB, so a heavy PDF often bounces right back. Learn the actual size limits and three free ways to get your file delivered: compress it, split it, or share a link.

Sometimes, the content of the scanned document is not positioned correctly. Learn how to fix that in the easiest possible way and for free.

Learn how to protect your sensitive information inside PDF files by setting a password or limiting specific options like disabling printing.

A smaller PDF is easier to email, upload, and store. Step-by-step instructions for three ways to shrink one: our free online compressor, a ZIP archive, and Adobe Acrobat, plus advice on when each makes sense.