Add password
Ask for a password to open
Ask for a password to open
Choose one PDF. You can also drop files anywhere on this page.
Files are processed on this device and never uploaded.
Add a password to a PDF
Make a copy of a PDF that can’t be opened without a password. The file is encrypted in this browser tab: neither the PDF nor the password is sent anywhere.
How to password protect a PDF
Choose a PDF
Pick the file or drop it on the page.
Choose a password
Type it, then type it again. It takes 4 to 32 characters: letters A–Z without accents, digits, spaces and symbols such as ! ? #.
Add the password
Press Add password and download the protected copy. Your original stays as it is, without a password.
A PDF that asks before it opens
- The copy is encrypted with AES-256, the strongest encryption the PDF format has, and is checked before you get it: it must refuse to open without the password and open with it.
- If you forget the password, nobody can open the file, not even PDF Case. Keep the original or the password somewhere safe.
- Anyone who has the password can open the file and also remove the password. A PDF password does not stop a reader from copying or forwarding what they can read.
- The password is not stored: not in the address, not in Your files, not in the browser.
Questions
- Are my PDF and password sent anywhere?
- No. The PDF is encrypted by code in your browser, on your device. The page is not allowed to contact any other site.
- What if I forget the password?
- The file can’t be opened. There is no reset and no back door; that is what makes the protection real.
- How long must the password be?
- From 4 to 32 characters. Longer and less guessable is better: a short password can be found by trying many.
- Can I remove the password later?
- Yes, with Remove password, if you know it.
- Can I block only printing or editing?
- No. This tool adds a password to open the file. Restrictions without an open password are easy to remove, so it doesn’t offer them.