Choose your input
Choose an unencrypted PDF.
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Protect PDF
Add AES-256 password protection and document permissions.
Runs locally in your browser. Your files are never uploaded.
Preparing private workspace…
Process locally
Enter and confirm a password of at least eight characters.
Review the result
Select Protect PDF and keep the tab open while encryption completes.
Use the output
Download the protected copy and test the password in a trusted PDF reader.
About this tool
What Protect PDF does
Protect PDF adds AES-256 encryption with a password required to open the document. It also sets permissions that discourage copying, modification, and page assembly while allowing accessibility and common reading actions. Encryption happens locally; Talzo does not receive the file or password.
Practical example
A realistic way to use it
Before emailing a private statement, create a protected copy and communicate the password through a different secure channel.
Know before you use it
Supported workflow and limitations
- PDF permissions are advisory and reader support varies.
- Encryption cannot protect a weak or carelessly shared password; metadata may remain visible.
Common questions
Protect PDF FAQ
Which encryption does Talzo use?+
Protect PDF uses AES-256 encryption for new protected copies.
Can Talzo recover my password?+
No. The password is not sent to Talzo, so store it safely.
Are my PDF and password uploaded to Talzo?+
No. Talzo processes your PDF and password inside your browser. The private input is not sent to our server.
Are copy and edit restrictions guaranteed?+
No. PDF permissions depend on the reader and should not replace strong access control.
How should I share the password?+
Use a different trusted channel from the one used to send the PDF.
Tool behavior and guidance last reviewed June 28, 2026.