Is it safe to protect PDFs online using this tool?

Yes, completely safe! Our tool processes PDFs entirely in your browser. Your file never leaves your device or gets uploaded to any server.

What encryption does this use?

We use standard PDF encryption (128-bit AES) which is industry-standard and very secure. The password you set will be required to open the PDF.

Can I protect multiple PDFs at once?

Currently, you can protect one PDF at a time. For now, simply protect them one by one - it only takes seconds per file!

What happens if I forget the password?

Make sure to remember your password! If you forget it, there is no way to recover access to the PDF. PDF encryption is very strong and cannot be bypassed.

Protect PDF - Add Password Protection Free

Add password protection to your PDF files instantly. 100% secure - all processing happens in your browser. No upload, no server, complete privacy.

Upload PDF to Protect

Accepted: .pdf • Max 104857600MB

Why Use Our PDF Protect Tool?

100% Secure & Private

All processing happens in your browser. Your files never leave your device, ensuring complete privacy and security.

Strong Encryption

Uses industry-standard PDF encryption to protect your documents from unauthorized access.

Instant Processing

Add password protection in seconds. No waiting in queues or slow server processing.

No Upload Required

Your PDF is never uploaded to any server. Everything processes locally on your computer.