🔒 Add Password to PDF

Protect any PDF with a password in your browser — no upload to any server. Set open password, owner password, and control what users can do with the PDF.

🔒

Drop PDF to protect

or click to browse — PDF files only

📄

—

Open Password *

Enter a password

Owner Password (optional)

Owner password unlocks all permissions

Permissions for users

Allow Printing Allow Copying Allow Editing Allow Annotations

🔒 100% Free · No Login · File Never Leaves Your Browser

📖 How to Use

Upload PDF

Drop or select any PDF file you want to protect

Set Password

Enter an open password and optionally an owner password

Download

Click Add Password and download your protected PDF

❓ Frequently Asked Questions

What is the difference between user and owner password?+

The user (open) password is required to open the PDF. The owner password controls permissions like printing and copying — it can override restrictions. If you don't set an owner password, it defaults to the same as the user password.

Can I restrict printing and copying?+

Yes. Use the Permissions section to allow or disallow printing, copying text, editing, and annotations. These restrictions apply to users who open with the user password.

Is the encryption strong?+

The tool applies AES-128 encryption which is supported by all modern PDF viewers including Adobe Acrobat, Preview, and browser PDF viewers.

Are my files sent anywhere?+

No. All PDF processing happens locally in your browser. Your file and password are never uploaded to any server.