Protect PDF with Password
Add a strong password to your PDF to restrict access and permissions. Free, private, and instant — encryption happens in your browser.
Select a PDF to protect
Drag & drop your PDF here, or click to browse. You'll set the password in the next step.
How to password protect a PDF online
Upload your PDF
Select the PDF file you want to protect from your device or drag it into the upload area.
Set a password
Enter an open password and optionally restrict printing, copying, or editing with permission settings.
Download protected PDF
Click Protect PDF and download your password-encrypted file immediately.
100% Private
Encryption happens entirely in your browser — your PDF and password are never sent to a server.
Strong 256-bit Encryption
Uses AES-256 encryption — the same standard used by governments and financial institutions.
Free Forever
Protect as many PDFs as you need, completely free with no sign-up required.
Permission Controls
Set separate passwords for opening and for restricting printing, copying, and editing.