Secure PDF Documents With AES-256 Lock
Apply industrial-grade protection to your PDF documents instantly. Secure your files with passwords and granular permission controls.
Upload PDF to Lock
Drag and drop your file here, or click to browse
Industrial Security Features
Protect your sensitive data with confidence
Open Password
Set a strong password that users must enter before they can view the document.
Permission Lock
Block printing, text copying, and editing with an owner-level master password.
AES-256 Bit
Uses professional high-bit encryption that meets global security standards.
Local Safety
No files are ever uploaded. Decryption and locking happens in your private sandbox.
How to Lock Your PDF
Secure your documents in three easy steps
Upload PDF
Select the PDF file you wish to secure from your device.
Set Rules
Enter your passwords and choose which permissions to restrict.
Lock & Save
Download your professionally encrypted PDF file instantly.
Ready to Secure Your Files?
Don't leave your sensitive documentation exposed. Lock it with military-grade encryption today.