You can use our Password Protect tool to protect your PDF file with a secure and nearly unbreakable password at no cost.
You can use the Smallpdf Protect PDF tool to encrypt your PDFs with unbreakable passwords online—for free.
The quickest way to protect and prevent the content of your PDF document from being edited or copied.
Creating a strong, secured and memorable password is not difficult. Follow our guide to do so at the snap of a finger.
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.