Free Protect PDF Tool

Upload a PDF, add a password, and download a protected copy with 128-bit AES encryption without leaving your browser.

Drop a PDF file here

Everything happens in your browser.

We do not store your documents on our servers.

What this protect PDF tool does

This protect PDF tool adds an opening password to a PDF and creates a new encrypted copy you can download. It is useful when you need a simple extra layer of access control before sending contracts, reports, drafts, or internal documents.

You can use it for one PDF or a batch, depending on the workflow. That makes it easier to prepare client-ready or team-only documents without opening a dedicated desktop PDF application first.

How It Works

1

Upload the PDF you want to protect

Drag in a PDF or choose one from your device.

2

Enter a password

Type the password you want to require when the PDF is opened, then confirm protection.

3

Download the protected copy

Save the new PDF protected with 128-bit AES encryption.

Frequently Asked Questions

Is this protect PDF tool free?

Yes. You can add password protection to a PDF here for free and download the protected copy.

Is PDF protection applied in the browser?

Yes. The protection flow runs in your browser, so your PDF stays on your device while the password is added.

What kind of protection does this use?

This tool protects the PDF with 128-bit AES encryption.

Do I need a separate PDF app to protect a file?

No. Just upload a PDF, enter a password, and download the protected version.

Do you store my PDF or password?

No. The protection flow stays in your browser, and we do not keep your uploaded PDF or its password on our servers.

Can I protect a PDF that already has a password?

No. If the PDF is already password protected, unlock it first and then upload it here to add a new password.

Can I use one password for multiple PDFs?

Yes. In multiple mode, you can protect several uploaded PDFs with the same password in one batch workflow.

Does password-protecting a PDF overwrite the original file?

No. The tool creates a new protected copy for download and leaves your original document unchanged.