Protect PDF
Add AES-256 password protection to your PDF to prevent unauthorized access, free online.
How to use Protect PDF
- Upload the PDF you want to protect.
- Enter and confirm a password.
- Click protect and download the encrypted PDF.
About Protect PDF
Protect PDF is a free Becoderr tool. It needs no sign-up, runs fast and privately, and works right in your browser for most tasks. For the few server-based tools, your files are processed in memory and discarded immediately after the operation.
Frequently asked questions
What encryption is used?
Files are encrypted with AES-256, the same strong standard used by professional tools.
What happens if I forget the password?
The password cannot be recovered, store it safely. Use the Unlock tool with the correct password to remove protection.
Is this tool free to use?
Yes. Every tool on Becoderr is completely free with no sign-up required. Signed-in users get higher file-size limits.
Are my files safe?
Yes. Browser-based tools process files entirely on your device; nothing is uploaded. Server-based tools process files in memory and discard them immediately after the operation.
Is there a file size limit?
Server-based tools accept up to 5 MB for anonymous users and 50 MB when signed in. Browser-based tools are limited only by your device.