Protect PDF
PDF → PDF
Lock down sensitive PDFs with military-grade AES-256 encryption. Add passwords and restrict printing securely without server uploads.
About this tool
About Protect PDF
Protect PDF is a free, browser-based tool that lets you lock down sensitive PDFs with military-grade AES-256 encryption. Add passwords and restrict printing securely without server uploads. It supports PDF → PDF. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open Protect PDF, add your input, and get results instantly.
How to use Protect PDF
1
Upload Unprotected PDF
Select the document you want to secure.
2
Set Passwords
Enter a strong open password and choose permission restrictions.
3
Download Encrypted PDF
Save the locked, AES-encrypted file.
Key features
AES-256 Encryption
Utilizes the highest encryption standard available to secure your sensitive data.
Instant Locking
Apply passwords instantly without waiting for a server round-trip.
Client-side Security
Your unencrypted file and password are never transmitted over the internet.
100% Private
Protect PDF processes your data locally in the browser. Nothing is uploaded, tracked, or stored u2014 your files never leave your device.
1 / 2
Featured on
