Protect PDF with an AES-256 password
Protect PDF with an AES-256 password
Protect a PDF free with AES-256 encryption and an opening password. Create a protected copy and check that the chosen password opens it.
What you can do
- Set a document-opening password
- Use AES-256 encryption
- Save a new password-protected PDF
How to use
- Select a PDF that opens without a password.
- Set and keep an opening password.
- Download the encrypted file and test opening it with that password.
Supported files and limitations
Keep the password yourself; no password recovery is provided. Documents with digital signature fields may be unsupported.
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