Password protect a PDF
Encrypt a PDF copy with an opening password.
Your files are processed in your browser. No account or upload is required.
Enable JavaScript to choose files and use this tool.
How to password protect a PDF
- Choose the PDF you want to protect.
- Enter and confirm a password.
- Create the protected copy and store the password safely.
Before you save
- Oxford PDF does not store or recover your password. If you lose it, you may lose access to the encrypted copy.
- Encryption is not a digital signature. Unsupported or already protected files can be refused.
Useful details
Will the password be sent to a server?
No. Encryption runs locally in the browser, and the tool does not upload the PDF or password.
Will my original file also become locked?
No. The tool creates a new encrypted copy. Your original remains unchanged.