Protect PDF

Protect your PDF with a password (128-bit encryption) and set permissions.

Protect your PDF with a password (128-bit encryption) and set permissions. Free, no sign-up, no watermark and no usage limits. Also searched as: protect PDF, add password to PDF.

How to use: Protect PDF

  1. Open Protect PDF and select or drag your files into the upload area.
  2. Adjust the options if you like. You see everything before confirming.
  3. Click to process and download the result right away.

Frequently asked questions

Is Protect PDF free?

Yes. It works with no sign-up, no watermark and no file limits.

Are my files safe?

Yes. The file is processed in your own browser and is never uploaded to any server.

Do I need to install anything?

No. It works right in the browser, on computer, tablet or phone (Chrome, Edge, Firefox or Safari).

Is there a size limit?

We set no limit. Very large files depend on your device's memory; processing is faster on a computer.

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