How to password-protect a PDF online
Upload your PDF using the box above, enter the password you want to lock it with, then click Protect PDF. Anyone opening the file afterward will be asked for that password first.
What if I forget the password?
We don't store your password after the file is processed, so there's no way for us to recover it. Keep a copy somewhere safe before sharing the protected file.
💡 Tip: already have a password-protected PDF you need to open? Use Unlock PDF instead.
Why use U Love Office to protect PDFs?
- No signup required — upload and protect immediately.
- Your password only — we never store or see it after processing.
- Original quality — no re-compression, just encryption.
- Free — no credits, no paywall.