Protect sensitive PDFs with free 128-bit AES encryption using Smallpdf’s online tool—no software needed, works on any device in under a minute.
Protect PDF from editing and copying in minutes. Use two simple methods to lock your file before you share it.
Password-protect your Word document in seconds. Or use Smallpdf’s online Protect PDF tool for stronger encryption and easier sharing.
Securing a PDF with strong password protection has never been easier. It’s also free—no registration or strings attached!
A smart and simple solution for locking your PDF files with an unhackable password. Protect your files with military-grade security.
Creating a strong, secure, and memorable password isn't difficult. Follow our quick guide to get it done in a jiffy!
We’ve written a few articles to guide you on how to best password protect your PDF documents. For other file formats, you can always convert them to PDF format, so that you can utilize this tool to encrypt it.