Password Protect PDF — Add a Viewing Password
Add a password to your PDF so it cannot be opened by anyone who doesn't know it. Useful for sending sensitive documents by email or storing them in shared drives.
View-open password
The password protects opening the file. Once opened, the content can be read, printed and copied as usual.
Choose a strong password
A short password can be brute-forced quickly. Use at least 12 characters mixing letters, numbers and symbols — or use the Password Generator tool.
Frequently Asked Questions
If I lose the password, can I recover the file?
No. That's the point of encryption. Store your passwords in a password manager.
Does the password stop copying or printing?
This tool only sets an open-password. Fine-grained permissions (no printing, no copying) require desktop software like Acrobat.
Is the encryption strong?
Modern AES-256 encryption via pdf-lib — same standard used by government and enterprise PDFs.