How to Password-Protect a PDF in Your Browser

Email is not a vault. If a PDF must travel, a password is a simple extra layer—especially for tax docs and ID scans.

Encrypt PDF sets an open password and permission flags using client-side crypto via @cantoo/pdf-lib. Your file is not uploaded to encrypt it.

Share the password out of band (text or call), not in the same email as the attachment.

Unlock PDF removes a password you already know from a PDF you own—useful when you need to merge or edit a protected file you control.