How to Password Protect a PDF

Add password encryption to your PDF to prevent unauthorized access — entirely in your browser.

Your files are processed locally. Nothing is uploaded.

Use This Tool Now

Drop your PDF and set a password to protect it.

1
Upload your PDF
Drag and drop your PDF file or click to browse.
2
Set a password
Enter a strong password. This password will be required to open the PDF.
3
Encrypt and download
Click "Protect" and download your encrypted PDF. The password is applied locally in your browser.

Use a strong password with a mix of letters, numbers, and symbols.
Store the password securely — there is no way to recover a forgotten password.
The encryption happens in your browser — your password is never sent to a server.

What encryption method is used?

PDFMint uses RC4 128-bit encryption, which is compatible with all PDF readers.

Can I recover a forgotten password?

No. Passwords are applied locally and never stored on any server. If you forget the password, the PDF cannot be recovered.

Can I set different open and permission passwords?

Currently, PDFMint sets a single open password. The PDF requires this password to view its contents.

No sign-up required. Your files never leave your device.