Protect PDF - 100% Free Online Tool
Need to secure sensitive PDF documents with password protection? Our Protect PDF tool adds 256-bit AES encryption to your files, requiring a password to open or edit. You can set different passwords for opening (user password) and modifying (owner password), giving you complete control over document access and permissions.
This is essential for securing confidential documents, financial reports, legal contracts, or personal information. The encryption meets industry security standards and works with all PDF readers. Your protected documents remain secure whether shared via email, cloud storage, or physical media.
Key Features: 256-bit AES encryption • Separate user/owner passwords • Control permissions • Industry-standard security • Works with all PDF readers
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Step 1: Upload Your Files
Supports: PDF • Max file size: 50MB • Unlimited files
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Frequently Asked Questions About Protect PDF
Everything you need to know about our Protect PDF tool
Yes, completely free! No hidden costs, watermarks, or registration required. Our Protect PDF tool is 100% free with no limitations on the number of files you can process or the size of your documents (up to 50MB per file). We believe powerful PDF tools should be accessible to everyone.
Military-grade security: Your files are encrypted with 256-bit SSL during transfer and automatically deleted from our servers after 1 hour. We never store your processed files, and all processing happens in isolated, secure environments.
Maximum flexibility: We support files up to 50MB each. For larger files, use our Compress PDF tool first to reduce file size.
Portable Document Format
Fully responsive design: Our tools work perfectly on all devices - desktop, tablet, and mobile. No app download required! The interface automatically adjusts to your screen size, and touch-friendly controls make it easy to upload and process files from any device.
Our Protect PDF tool is designed for ease of use and maximum efficiency. Simply upload your files, configure any necessary settings, and download your processed document within seconds. The tool handles all the complex processing in the background, delivering professional results without requiring technical expertise.
If you encounter any issues or have specific requirements not covered by our standard options, please contact our support team for assistance. We're constantly improving our tools based on user feedback to provide the best possible experience.
Complete Your PDF Workflow
Discover tools that work perfectly with Protect PDF
Before Protect PDF
Prepare your files with these tools
You're Here
Protect PDF
After Protect PDF
Continue your workflow with these tools
Master Your Digital Documents
PDFs are more than just files—they're essential business tools. Understanding PDF formats, security, and management can save hours and prevent problems.
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Best practices for large-scale PDF workflows, compliance, and efficiency in business environments. ISO standards and document governance.
Your Security is Our Priority
SSL Secured
256-bit encryption
GDPR Compliant
Privacy first approach
Auto Delete
Files deleted in 1 hour
No Storage
We don't keep your files