Encrypt PDF — Password Protect PDF Online
Password-protect your PDF so only authorized users can open or edit it — processed entirely in your browser.
How to encrypt PDF
- 1Upload your PDF file to the upload area
- 2Enter a user password (to open) and/or an owner password (to restrict editing)
- 3Click 'Encrypt'
- 4Download the password-protected PDF
Features
- AES-256 encryption — industry-standard security used by banks and governments
- Separate user password (open) and owner password (edit/print)
- Restrict permissions: disable printing, copying, and modifications
- Processed in your browser — your PDF never leaves your device
When it's useful
- Protect a confidential contract or report before sharing
- Prevent a client from editing or printing a PDF
- Secure personal documents on a shared computer
FAQ
What is the owner password?
The owner password restricts permissions — it prevents printing, copying text, and editing. The recipient can still open the file but cannot change it.
What encryption strength is used?
AES-256 encryption is applied — the same standard used by banks and government agencies.
Can I remove the password later?
Yes — use the 'Decrypt PDF' tool. You will need to know the original password.
What if I forget the password?
There is no way to recover a forgotten password. Always store your password in a safe place.
Is the file uploaded to a server?
No. Encryption is performed entirely in your browser — the file stays on your device.