FileQuick

Protect PDF

Add a password to a PDF so it asks for it on open.

How to password protect a PDF

Add a password to a PDF so it asks for it every time someone opens the file, with real encryption behind it. Free, no watermark.

Before you email a contract, a statement or anything with personal data, adding an open password means an intercepted or forwarded copy is unreadable without the key. Choose a strong password, share it with the recipient through a separate channel, and send the protected file.

The PDF is encrypted, not just flagged — the content cannot be read without the password.

This tool uses FileQuick’s conversion engine. To remove a password from a file you own, use Unlock PDF.

Steps

  1. Open Protect PDF and upload your file.
  2. Type the password you want to set (and confirm it).
  3. Start the protection.
  4. Download the encrypted PDF and share the password separately.

Frequently asked questions

How do I password protect a PDF?

Upload the PDF, set a password, and download the encrypted file. Anyone opening it will be asked for that password.

Is the PDF actually encrypted?

Yes — the content is encrypted, not just marked read-only, so it cannot be read without the password.

What if I forget the password?

There is no recovery. Store it safely — without it the file cannot be opened, by you or anyone else.

Is my file uploaded?

Files are processed for conversion and not stored long-term.

Related tools