Add a password to a PDF
Lock a PDF with a password so it can only be opened by someone who knows it — useful for sending contracts, financial documents, or anything you don't want opened by the wrong person.
How it works
- 1Upload the PDF you want to protect.
- 2Type the password you want to require to open it.
- 3Click "Process & download" to get the password-protected file.
Frequently asked questions
The file is encrypted with 256-bit AES — the current standard for PDF password protection — using the open-source qpdf library.
No — that's the point of real encryption. There's no backdoor or recovery option, so store the password somewhere safe before sending the file.
This sets a password required just to open and view the file. Separate printing or editing restrictions aren't set by this tool.