About PDF Password Protect & Encrypt
Secure any PDF document with military-grade AES-256 encryption. Set custom viewing, printing, and copying permissions directly in your browser with zero server uploads.
Key Capabilities & Features
- 100% in-browser PDF encryption
- Set user open password and owner permissions
- Instant client-side compilation
- Preserves original vector layouts, fonts, and forms
How to Use PDF Password Protect & Encrypt
Select PDF
Choose the PDF file you wish to encrypt from your computer.
Enter Password
Type your chosen document password and confirm it.
Encrypt & Download
Click Protect PDF and download your secure encrypted document.
Privacy & In-Browser Execution Guarantee
Encrypted locally using WebAssembly and client-side crypto. Your passwords and PDF contents never leave your device.
Frequently Asked Questions
How does NEOKYRU compare to iLovePDF for this tool?
Unlike iLovePDF which transmits your private documents to third-party cloud servers with strict file size limits and paywalls, NEOKYRU runs 100% client-side in your browser via WebAssembly. Your files never leave your computer, there are no file size caps, zero queue wait times, and it is 100% free with no registration required.
Can anyone open the PDF without the password?
No, standard PDF password protection requires entering the decryption key in any PDF reader before viewing.