AES-256 encryption
Create strongly encrypted PDF copies compatible with standard PDF readers.
Private by design
Private PDFs, properly protected.
Add a password to any PDF with AES-256 encryption. Your documents are processed locally and stay right on your device.
No accountOn-device processingPasswords never stored
Protection made simple
Secure the file. Keep control.
Everything you need to create and manage password-protected PDF copies without creating an account.
Processed locally
Your PDF content is handled on your Android device, not uploaded to PDF Locker servers.
Share when ready
Open, share, or save a protected copy to a destination you choose.
Three easy steps
From open PDF to protected copy.
Choose a PDF
Select a document through Android's secure file picker.
Set a password
Enter and confirm a password of at least eight characters.
Save or share
Keep the encrypted copy in your vault or send it where it needs to go.
Built for everyday privacy
Protection without the complicated setup.
No sign-up, no cloud account, and no password database. Just straightforward local PDF protection.
Contact support