Protect a PDF with a password
Add a password to your PDF with strong 256-bit AES encryption, so only people you share the password with can open it.
Drop your file here
or click to browse
How to protect pdf
- Drop the PDF you want to protect.
- Type the password to lock it with.
- Click Protect PDF and download the encrypted file.
Frequently asked questions
How strong is the encryption?
256-bit AES — the same standard used for sensitive documents.
Can I remove the password later?
Yes — use our Unlock PDF tool with the password you set.
Is it free?
Yes, free with no signup and no watermark.