Password protect PDF
Add a password so your PDF only opens with the right key.
Your files never leave your device. All processing happens inside your browser.
The password is applied to the file only in your browser; write it down somewhere.
How to use it
- 1Select the PDF file.
- 2Enter a password of your choice (at least 4 characters).
- 3Download the password-protected file.
Worked examples
Sample calculation
After encryption, opening the file in any program requires entering that same password.
Frequently asked questions
Is my file uploaded to a server?
Your files never leave your device; all processing happens inside the browser.
What happens if I forget the password?
There is no way to recover it; be sure to keep the password somewhere safe.