Protect PDF Files
Protect your PDF files with strong password encryption using our free online tool. Add 256-bit AES encryption to secure sensitive documents, prevent unauthorized access, and control who can view your PDFs. No software installation required - protect PDFs directly in your browser with bank-level security.
Why Protect PDF Files?
Need to secure confidential PDFs? Whether you're protecting business contracts, financial documents, personal records, or sensitive information, our tool helps you add password protection quickly and easily. Perfect for preventing unauthorized access, securing email attachments, protecting intellectual property, or complying with privacy regulations. Simply upload your PDF, set a strong password, and download your encrypted document in seconds.
Features That Make a Difference
256-bit AES Encryption
Industry-standard encryption that's trusted by banks and governments worldwide
User Password Protection
Set a password that users must enter to open and view the PDF document
Owner Password Protection
Control printing, editing, copying permissions with owner-level passwords
Fast Processing
Encrypt and protect PDFs in seconds with optimized processing
No Quality Loss
Protection doesn't affect PDF quality, resolution, or formatting
All PDF Versions
Support for protecting all PDF versions from 1.0 to the latest 2.0 specification
Why Choose Our Tool?
Our PDF protection tool uses military-grade 256-bit AES encryption, the same standard used by banks and government agencies. Unlike basic tools that offer weak protection, we implement proper encryption that can't be easily bypassed. The protection process is fast, secure, and produces PDFs that work with all major PDF readers. Your original files and passwords are never stored - we process everything securely and delete files immediately after protection.
Common Use Cases
Secure Business Documents
Protect confidential contracts, proposals, financial reports, and business plans from unauthorized access
Protect Personal Records
Secure tax documents, medical records, legal papers, and other sensitive personal information
Email Attachments
Add password protection to PDFs before emailing to ensure only intended recipients can open them
Intellectual Property
Protect proprietary documents, research papers, designs, and other valuable intellectual property
Compliance Requirements
Meet GDPR, HIPAA, and other regulatory requirements for protecting sensitive information
Client Confidentiality
Lawyers, accountants, and consultants can protect client documents before sharing
Optimization Tips
Choose a strong password with at least 12 characters, mixing uppercase, lowercase, numbers, and symbols. Avoid common words or easily guessable information. Share the password separately from the protected PDF - never email them together. For critical documents, consider using a password manager to generate and store complex passwords securely. Remember that password protection is only as strong as the password you choose.
Privacy & Security
Your security is our absolute priority. All file transfers use 256-bit SSL encryption. Your passwords are never logged, stored, or accessible to anyone - not even us. Files are processed in isolated secure containers and permanently deleted from our servers within 60 seconds of processing completion. We maintain a strict zero-knowledge policy and comply with international data protection regulations including GDPR and CCPA.