Are my PDF and passwords uploaded?

No. Encryption runs with QPDF WebAssembly only on your device.

What if I only set a user password?

The PDF opens with that password and typically has no extra usage restrictions (same as leaving owner password empty in BentoPDF).

What does the owner password do?

When you set a separate owner password, SagePDF applies restriction flags: no printing, copying, modifying, annotating, form filling, or assembly—unless a viewer respects the owner password.

Can I encrypt an already encrypted PDF?

Yes. Enter the current password, then choose new user (and optionally owner) passwords.

Encrypt PDF Free Online

Use SagePDF to encrypt pdf free online. Lock your PDF by adding a password. Use SagePDF in your browser—no uploads, no signup, your files stay on your device.

Password-protect your PDF

256-bit AES encryption in your browser. User password is required to open the file. An optional owner password locks printing, copying, and editing. Files never leave your device.

Drop your PDFs here, or click to choose files

Your files never leave your device. All processing happens in your browser.

How to use

Upload your PDF

Choose the PDF to protect. If it is already encrypted, enter the current password first.

Set passwords

User password is required to open the file. Owner password is optional—when set, printing, copying, and editing are restricted unless the owner password is used.

Encrypt & download

Click Encrypt PDF. QPDF applies 256-bit AES in your browser, then download the protected file.

Frequently asked questions

Decrypt PDF
Unlock PDF by removing password protection.
Sanitize PDF
Remove metadata, annotations, scripts, and more.
Change Permissions
Set or change user permissions on a PDF.