Protect PDF with Password Online Free
Add password protection and set permissions to secure your PDF documents. Keep sensitive information safe from unauthorized access.
Upload PDF File
Drop PDF file here
or click to browse
Max file size: 100MB
Protecting your PDF...
Security Settings
Owner password allows setting permissions
Permission Settings
Why Protect Your PDFs?
Strong Encryption
Military-grade AES 128-bit or 256-bit encryption
Dual Password Protection
Separate user and owner passwords
Granular Permissions
Control printing, editing, copying
Fast Processing
Protect PDFs instantly
How to Password Protect a PDF Online?
Securing your PDF files takes less than 30 seconds. Upload your PDF, set a strong password, choose encryption level, and download your protected file instantly — no software installation needed.
Why Use 256-bit PDF Encryption?
AES 256-bit encryption is military-grade security used by banks and governments. Once protected, your PDF cannot be opened, printed, or copied without the correct password.
- ✓ Set separate user and owner passwords
- ✓ Restrict printing, copying, and editing
- ✓ Files processed in browser — never uploaded to server
- ✓ Works on all devices — mobile, tablet, desktop