Protect PDF — Add Password to PDF Online
Add password protection to PDF files. Encrypt your PDF with a secure password.
Drop your file here or click to browse
Maximum file size: 50.0 MB
Accepted: .pdf
Features
- ✓Password protection
- ✓AES encryption
- ✓Permission controls
- ✓Secure output
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Frequently Asked Questions
How do I use Protect PDF?
Upload your PDF, set a password, choose permissions, then click Protect to download the encrypted file.
Is Protect PDF free?
Yes, Protect PDF on ToolPix is 100% free with no signup or installation required.
Is my data safe?
Uploaded files are automatically deleted within 2 hours. We never share your data.
What encryption standard is used?
We use 256-bit AES encryption, the same standard used by banks and government agencies.
Can I restrict printing and copying?
Yes — you can set permissions to prevent printing, copying text, or editing while still allowing the document to be opened and viewed.
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