Warning: Password protection is not supported in browser-only mode. The output PDF will not actually be protected. For real encryption, a server or WASM-based solution is required.

Password Protect

Add password protection to your PDF files.

Drag & drop PDF file here

or click to select file

Maximum file size: 100MB

How to use:

Upload a PDF file you want to protect
Enter a user password (required to open the PDF)
Enter an owner password (required to modify the PDF)
Click "Protect PDF" to encrypt the file
Download the password-protected PDF

Privacy Note: All processing happens locally in your browser. Your files are never uploaded to any server.