PDF Password Protection
Protect your PDF files with password encryption online. Secure sensitive documents with 128-bit AES encryption. Works on all devices - mobile, tablet, and desktop. No registration required.
Drag & drop PDF here or click to upload
Maximum file size: 50MB
Encryption Settings
This password will be required to open the PDF file
This password provides full access to the PDF (bypasses restrictions)
Security Features
Your PDF will be protected with 128-bit AES encryption. Users will need the password to open the file, and editing, copying, and printing will be restricted for enhanced security.
🔒 Your files are processed securely on our servers with industry-standard encryption
Strong Encryption
128-bit AES encryption ensures your documents are protected with industry-standard security
Lightning Fast
Encrypt large PDF files instantly with our optimized processing engine
Privacy Secure
Your files are processed locally in your browser and never uploaded to our servers
How to Encrypt PDF Files
Upload PDF
Click to upload or drag and drop your PDF file. Supports files up to 50MB.
Set Password
Enter a strong password to protect your document. Optionally add an owner password for full access.
Encrypt & Download
Your PDF will be encrypted with 128-bit AES encryption and restrictions on editing, copying, and printing.
Perfect For
Why Choose Our PDF Encryption Tool?
Industry-Standard Security
128-bit AES encryption provides military-grade protection for your sensitive documents.
Permission Control
Restrict printing, copying, and editing to maintain full control over your documents.
Complete Privacy
All processing happens in your browser. Your files never leave your device.
Instant Download
Get your encrypted PDF immediately with no waiting time or processing delays.
Is this tool really free to use?
Yes, our PDF encryption tool is completely free with no hidden costs, watermarks, or registration required.
What's the maximum file size I can encrypt?
You can encrypt PDF files up to 50MB. For larger files, we recommend splitting them first using our PDF Splitter tool.
Are my files secure and private?
Absolutely! All processing happens in your browser. Your PDF files are never uploaded to our servers, ensuring complete privacy.
What encryption level do you use?
We use 128-bit AES encryption, which is the industry standard for PDF security and provides excellent protection for sensitive documents.
Can I set different permissions for my PDF?
Our tool provides standard security with password protection and basic restrictions on editing, copying, and printing. For advanced permission controls, we recommend using professional PDF software.