PDF Lock & Unlock

StudyBridge LLC

About this app

PDF Lock & Unlock is a simple, secure utility to protect your PDF files with a password or remove passwords when needed — completely offline.

🔐 Lock PDFs
Add a password to your PDF files to prevent unauthorized access.

🔓 Unlock PDFs
Remove password protection from PDFs when you know the correct password.

📱 Fully Offline
All processing happens on your device. No uploads, no servers, no tracking.

⚡ Fast & Simple
Pick a PDF, enter a password, and save the result instantly.

🛡 Privacy First
Your files never leave your phone. Perfect for sensitive documents.

Features:
• Lock PDF files with a password
• Unlock password-protected PDFs
• Works completely offline
• No account required
• No internet connection needed
• Lightweight and easy to use

Ideal for students, professionals, and anyone who needs quick PDF security on the go