PDF Tools GuideSEO & Knowledge Base
About Protect PDF
Encrypt PDF files with strong password protection to prevent unauthorized viewing.
Key Features & Benefits
- ✓Instant client-side processing with zero server delay
- ✓100% private & secure — no text stored or transmitted
- ✓Mobile-responsive layout with modern dark-mode interface
- ✓One-click copy to clipboard functionality
- ✓Supports large text payloads up to 100,000+ characters
How to Use Protect PDF
- 1Paste or type your plain text into the Protect PDF input box above.
- 2Select your desired settings or options using the interactive controls.
- 3Review the transformed output generated instantaneously in real-time.
- 4Click the "Copy Text" button to copy the output straight to your clipboard.
FAQ Help Desk
Frequently Asked Questions
What encryption standard is used to protect PDF files?↓
The tool applies standard 128-bit AES password encryption to restrict unauthorized opening.
Is my password sent to an external server?↓
No, password encryption is processed locally inside your browser for total security.