Security
Protect PDF
Encrypt your document with a password using AES-256.
Free to use · Files stay on your device · No signup
This tool works in your browser. Enable JavaScript to select files and create your download.
How to use Protect PDF
- Choose a readable, unencrypted PDF.
- Enter the new password you want to require when opening the file.
- Process and download the encrypted PDF. Keep the password somewhere safe.
What you need
Choose PDF files.
Your result
A password-protected PDF.
Before you start
The tool uses AES-256 encryption. FreeToolBench does not store passwords or provide password recovery.
Questions about Protect PDF
How do I use Protect PDF?
Choose a readable, unencrypted PDF. Enter the new password you want to require when opening the file. Process and download the encrypted PDF. Keep the password somewhere safe.
What does Protect PDF produce?
A password-protected PDF.
What should I check before using Protect PDF?
The tool uses AES-256 encryption. FreeToolBench does not store passwords or provide password recovery.
Are my files uploaded?
Document processing runs on your device. The website downloads its code and processing engines, but the tools do not upload your documents.