Protect PDF
Encrypt and Password-Protect PDF Files with AES-256
Drag and Drop PDF files here
Fast, 100% private in-browser processing. Your files never leave your device.
Secure your confidential PDF documents with military-grade AES-256 encryption and strong passwords. 100% private in-browser encryption.
How to use Protect PDF
Upload PDF
Select the document you want to secure.
Enter Password
Choose a strong user password and optional owner/permission password.
Encrypt & Download
Save the encrypted PDF. A password will now be required to view the document.
Key Features & Capabilities
Military-Grade AES-256
Industry-standard cryptographic protection ensures unauthorized parties cannot read your files.
Zero Upload Encryption
Encryption keys and files never touch a server; all cryptographic operations run in browser memory.
Frequently Asked Questions
What happens if I forget the password?
Because encryption runs locally and no passwords are stored on servers, we cannot recover forgotten passwords.
🔒 100% Client-Side Privacy Guarantee
OM PDF processes all documents entirely in your web browser memory using WebAssembly. Your files are never uploaded to any cloud server, preventing data leakage and guaranteeing total security for confidential documents.