PDF password encrypt & unlock
Add an open password to a PDF, or unlock it when you already know the password.
Files stay in your browser. We never upload, store, or try to crack passwords.
Choose a file
Supports common AES-256 / AES-128 / RC4 user or owner passwords. Already-encrypted files must be unlocked before re-encrypting. This is not a cracker.
Drop a PDF here, or click to choose
One file at a time · folders ok (first PDF) · PDF only
Encrypt: open password required. Unlock: enter the user or owner password you already know.
AES-256 is preferred. RC4 may help older readers.
If empty, the open password is also used as the owner password.
Shortcuts:Ctrl+Enter run · Esc clear
Frequently asked questions
Can it crack forgotten passwords?
No. Unlock requires a password you already know; there is no brute-force attack.
Uploaded?
Files are processed locally in your browser and are not uploaded.
How strong is encryption?
Uses browser/library PDF encryption suitable for open-password protection—not an enterprise security audit.