Add Password to PDF
Protect a PDF with a password so it can't be opened without it.
or drag a file here
Advertisement
How to use
- 1Upload a PDF.
- 2Enter the password required to open it (and, optionally, a separate owner password for permissions).
- 3Click Add Password and download the protected file.
Frequently asked questions
How strong is the encryption?
RC4 128-bit — enough to require a password in any standard PDF reader, but not the strongest encryption available. Treat it as basic access control, not vault-grade security.
Is my PDF uploaded to a server?
No. Encryption happens entirely in your browser — your file and password never leave your device.