Protect & Encrypt PDF

Add a Password to Your PDF

Securing sensitive documents like tax forms, medical records, or legal contracts before sending them via email is crucial. Our Protect PDF tool allows you to add a strong password to any PDF file instantly. Using advanced 128-bit AES encryption, we ensure that unauthorized users cannot open, copy, or print your document without the correct password.

100% Private & Browser-Based

When you upload a PDF to commercial software, it is often sent to a remote server for processing. MixOMall’s Protect PDF tool runs entirely in your web browser using WebAssembly and JavaScript. Your original PDF and your password never leave your computer, guaranteeing total privacy and security.

How to Protect Your PDF

1. Drag and drop your PDF file into the secure upload zone above.
2. Type a strong password into the input box. Use the eye icon to verify your spelling.
3. Watch the password strength meter to ensure your password is hard to crack.
4. Click “Encrypt & Download PDF”. Your secure file will download instantly.