Protect PDF Online Free - Add Password

PDF tool

About Protect PDF

Password protect PDF online free with open password, permissions and qpdf WebAssembly encryption in your browser. The work happens in your browser, so the selected PDFs stay on your device while you prepare the result.

Adding an open password to sensitive PDFs before sending or storing them.

Restricting common permissions such as printing, copying and editing when supported by PDF viewers.

Practical notes

Keep the password somewhere safe because the site does not store it.
Permissions depend on PDF viewer behavior, so use a strong open password for real protection.

Common questions

Can I add a password to a PDF?

Yes. The protect tool can add an open password using qpdf WebAssembly in your browser.

Can I set PDF permissions?

Yes. You can configure common permissions such as printing, copying and editing where supported by PDF viewers.

Does FreeConvert store my PDF password?

No. Password processing runs in the browser and FreeConvert does not store your password.