PDF Guides

Short, practical guides for common PDF jobs, and how to do them without uploading your files.

How to Merge PDF Files Without Uploading Them

A quick guide to combining several PDFs into one, keeping the order right and your files private.

Three ways to add your signature to a PDF without printing, scanning or creating an account.

Make a PDF small enough to email or upload, and learn when to choose lossless or stronger compression.

Encrypt a PDF with a password so only people you choose can open it, and how to pick a password that holds up.

Most online PDF sites upload your file to a server. Here is how that works, what the risks are, and how to verify a tool that does not.

Fix a typo, date or number in a PDF, and understand why editing PDF text is different from editing a Word document.