Protect PDF
Add a real password to a PDF, right in your browser.
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About Protect PDF
Protect PDF encrypts your document with a password using standards-based PDF encryption, so it can't be opened without it. Encryption happens on your device — the password is never sent anywhere.
1
Upload your PDF.
2
Set a password and choose printing/copying permissions.
3
Download your protected PDF.
Results can vary by file. Please review the output before relying on it — see our Disclaimer for details.
Frequently asked questions
Is this real encryption, or just a visual lock?
It's real, standards-based PDF encryption — the file genuinely cannot be opened in any PDF reader without the password.
What if I forget the password?
There is no recovery option — keep your password somewhere safe, since PDFDroid doesn't store it and can't retrieve it for you.