How to password protect a PDF

Encrypt a PDF so nobody can open it without the password. It uses AES-256, the strongest encryption in the PDF standard, and works in Adobe Reader, Preview, Chrome, Edge and every other PDF reader.

  1. Open your PDF.
  2. Type a password twice.
  3. Click Protect PDF and download the encrypted file.

Frequently asked questions

How strong is the protection?

The PDF is encrypted with AES-256. Without the password, the pages, text, pictures and details of the file cannot be read.

What if I forget the password?

Then the file cannot be opened, by anyone. The password is never stored or sent anywhere, so keep it safe.

Can I change the password of a protected PDF?

Yes. Open it here, type the current password, then choose the new one.

Are my files uploaded?

No. Everything happens in your own browser, on your own device. Your files are never sent to a server, so nobody else can see or keep them.

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