Protect PDF
Password protect PDF files with strong encryption directly in your browser.
Your files are processed directly inside your browser memory using local hardware acceleration. No images, videos, or documents are ever uploaded to cloud servers or stored anywhere.
Choose Files or Tap to Browse
Supports .pdf. 100% processed on your device.
Why Use Our Protect PDF?
Client-Side Encryption
Passwords and document contents never transit any network, preventing interception.
How to Use Protect PDF Online for Free
Upload your PDF.
Enter and confirm your chosen password.
Download your encrypted document.
Frequently Asked Questions
What happens if I forget the password?
Because encryption is performed client-side without backdoors, keep your password in a password manager.
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