Protect PDF
AES-256 encryption with an open password, plus optional limits on printing, copying and editing.
- Free
- No sign-up
- No watermark
How to use Protect PDF
- 1
Add one or more PDFs.
- 2
Choose a strong password and, optionally, permissions.
- 3
Press Protect PDF.
This tool runs entirely in your browser. Your files are never uploaded.
Frequently asked questions
How strong is the encryption?+
AES-256, the strongest standard in the PDF specification, supported by every modern reader.