Protect PDF
Password-protect your PDF to prevent unauthorized access.
Drop PDF here or click to browse
Single file · Max 100.0 MB
How it works
- 1
Upload your PDF file.
- 2
Set a user password and optionally an owner password with permissions.
- 3
Click "Protect PDF" and download your encrypted file.
Why use our Protect PDF?
100% Private
All processing happens in your browser. Files are never uploaded to any server.
No signup required
Use the tool instantly — no account, no email, no credit card needed.
Works everywhere
Runs on any device with a modern browser — desktop, tablet, or mobile.
No quality loss
Direct PDF manipulation preserves fonts, images, and vectors at original fidelity.
Frequently asked questions
What encryption standard is used?
AES-256 bit encryption, the same standard used in banking and government applications.
What is the difference between user and owner passwords?
The user password is required to open the PDF. The owner password controls permissions like printing, copying, and editing.
Can the password be recovered if forgotten?
No. Encryption is irreversible without the password. Store your password safely.
Is the password sent to any server?
Never. All encryption runs entirely in your browser. Your password and file never leave your device.
Can I allow printing but prevent copying?
Yes. The permissions panel lets you independently enable/disable printing, copying, form filling, and annotation.