Is using Protect PDF Online | Add Password to PDF — Comprexa completely free?

Yes, Protect PDF Online | Add Password to PDF — Comprexa on Comprexa is 100% free forever with no usage limits, ads, or signups required.

Are my files or inputs safe when using Protect PDF Online | Add Password to PDF — Comprexa?

Absolutely. Comprexa processes everything client-side inside your web browser session. Your data never touches remote servers.

No setup required. Protect PDF Online | Add Password to PDF — Comprexa works directly inside Chrome, Safari, Firefox, Edge, and mobile browsers.

Upload PDF to Protect PDF

Drag & drop your PDF file here

Select 1 PDF document to encrypt

Supported format: PDF

document.pdf

0 KB

Open Password * Required to open PDF

Confirm Password *

Advanced Settings & Permissions (Optional) Click to expand

Owner Password (Optional) If left blank, Open Password will be used as the Owner Password.

Document Security Permissions

Allow Printing Allow Copying Text Allow Editing Allow Annotations

Output Filename