Upload
Drop a PDF file — it never leaves your device.
Protect PDF
Lock a PDF with a password so only people you share it with can open it
P
document.pdf—
Document
Your PDF
Ready
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Set a password on the right. The PDF is locked with the strongest encryption the PDF format offers, which every PDF reader supports.
How Protect PDF works
Set a password
Type it twice so a typo cannot lock you out.
Download
Save the protected PDF. It asks for the password whenever it is opened.
Frequently Asked Questions
Are my PDF and password uploaded?
No. The encryption happens entirely in your browser. Neither the PDF nor the password ever leaves your device, and we never see them.
How secure is it?
The PDF is locked with the strongest encryption the PDF format offers. Its security depends on your password: a long password that is hard to guess is much safer than a short or common one.
What if I forget the password?
The PDF cannot be opened without it, and there is no way for us to recover it. Keep the password somewhere safe, or keep an unprotected copy of the original.
Will the protected PDF open everywhere?
Yes. Adobe Acrobat, browsers, phone PDF viewers and other readers all support password-protected PDFs and will ask for the password.