Protect PDF with a Password Online

Add password protection to any PDF file to control who can open or modify it. Protect confidential contracts, private reports, or sensitive personal files in seconds. Your file is processed securely on our servers and automatically deleted right after conversion.

How to password-protect a PDF

1. Upload your PDF by dragging it into the tool or clicking to browse.
2. Enter the password you want to use to protect the document.
3. Click Protect to apply encryption to the PDF.
4. Download the protected PDF — anyone who opens it will need the password.

Frequently asked questions

What encryption is used?

The tool applies AES-256 encryption, the industry standard for PDF protection, ensuring strong security for your documents.

Can I remove the password later?

Yes. Use the Unlock PDF tool on IslandPDF to remove password protection from a PDF you own.

What if I forget the password?

There is no way to recover a forgotten password. Keep it in a safe place before protecting your PDF.

Does protection prevent printing or copying?

You can set a password to open the document. Additional permissions restrictions depend on the PDF reader used.