Protect PDF
Lock a PDF with a password using AES-256.
About Protect PDF
Add a password so only people who have it can open the document, and optionally block printing or copying. Encryption uses AES-256, the same standard used by Acrobat, and happens entirely on your device.
- Share the password through a different channel than the file.
- Permissions like no printing are respected by viewers but are not as strong as the open password.
- Keep an unprotected copy for yourself.
How to use it
- 1Drop a PDF.
- 2Set an open password and, optionally, permissions and an owner password.
- 3Download the protected PDF.
Questions
- How strong is the protection?
- AES-256 with a good password cannot be cracked in practice. Short or common passwords can be guessed.
- Can I remove the password later?
- Yes, with Unlock PDF, as long as you know the password.
- Is the PDF or password uploaded?
- No. Everything runs in your browser, so your documents never leave your device.