Password Protect PDF
Encrypt your PDF with AES-256 password protection. Secure sensitive documents with industry-standard encryption.
Lock PDFs with AES-256 encryption - bank-grade security.
or drop the pdf here
100% Private
Instant Processing
Browser-Based
Features
AES-256 encryption
Strong password protection
Industry-standard security
Prevents unauthorized access
Works with any PDF reader
Secure processing
How It Looks
Unprotected
Password Protected
How It Works
1
Upload your PDF file
2
Enter a strong password
3
Click Protect to encrypt
4
Download your secured PDF
Common Use Cases
Protecting confidential documents
Securing financial records
Sharing sensitive information safely
Meeting compliance requirements
Frequently Asked Questions
What encryption does PDFSub use?
We use AES-256 encryption, the same bank-level security used by financial institutions and government agencies.
Can recipients open the PDF on any device?
Yes, password-protected PDFs work with all standard PDF readers on any device, including Adobe Reader and Preview.
What makes a strong password?
Use at least 8 characters with a mix of uppercase, lowercase, numbers, and symbols. Avoid common words or personal information.
Can I remove the password later?
Yes, use our Unlock PDF tool to remove password protection. You will need to enter the original password.