🔐 PDF Protector

Add password protection to a PDF — processed entirely in your browser. Nothing is uploaded to any server.

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Your PDF is processed entirely in your browser. No file is ever sent to our servers. Protection is applied using AES-128 encryption — the resulting PDF requires your password to open.

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Drop your PDF here or click to browse

PDF files only

How to use this tool

1 Upload the PDF you want to protect.
2 Set a user password (required to open) or an owner password (restricts editing and printing).
3 Choose the permissions to allow: printing, copying, editing.
4 Click Protect and download the secured PDF.

Frequently asked questions

What encryption strength is used?

256-bit AES encryption, which is the strongest encryption available for PDF files and meets compliance requirements for sensitive documents.

Can I add a watermark instead of a password?

Use the PDF Organizer tool to add text or image watermarks. Passwords and watermarks serve different purposes and can be applied together.

What happens if I forget the password?

There is no way to recover a forgotten password on a strongly encrypted PDF. Keep the password in a secure location, such as a password manager.

Does protecting a PDF prevent all copying?

It prevents direct copy-paste from PDF readers. However, screenshots and camera photos of the screen can always capture the content visually.