Protect PDF with a password
Lock a PDF with a password so only the right people can open it, and choose what they're allowed to do.
Private by design: your files are processed on your device and never uploaded.
How to protect PDF with a password
- Add your PDF.
- Type a password twice.
- Open “More options” to block printing, copying or editing.
- Press “Protect PDF” and download.
About Protect PDF
Files are locked with AES-256, the same strength banks use. Remember the password — without it, the file can't be opened.
Questions
Is it safe to password-protect a PDF here?
Yes. The work happens inside your own browser, so the file is never uploaded to a server — not ours, not anyone's. That makes it safe for contracts, bank statements, ID cards and other private documents.
How strong is the protection?
AES-256 encryption.
Can I stop people copying text?
Yes — leave “Allow copying text and images” off.
Is it really free?
Yes — PDF protection is completely free, with no sign-up, no watermark and no daily limit.
Can I lock a PDF on my phone?
Yes. It works in the browser on Android phones, iPhones, tablets and computers. Nothing to install. It works best in Google Chrome.