Adding a password to a PDF usually means installing Acrobat or trusting a web service with a document sensitive enough to need protecting in the first place. This tool sidesteps that by rendering each page locally and re-encoding the result with real PDF encryption, entirely inside your browser — the password you set is used to lock the file right there on your device and is never transmitted anywhere.
How to use the protect pdf tool
- 1
Upload your PDF
Drop in the file you want to protect.
- 2
Set a password
Type a password and confirm it.
- 3
Protect and download
Click Protect PDF & download to save the password-protected copy.
Common use cases
Share a sensitive document
Add a password before emailing a document with personal or financial information.
Restrict access to a file
Make sure only people you've given the password to can open a document.
Meet a basic security requirement
Add password protection where a form or process requires an encrypted PDF.
Frequently asked questions
Each page is re-rendered as an image, then reassembled into a new PDF that's encrypted with the password you set, using jsPDF's built-in encryption. This all happens locally in your browser.