Protect PDF with a Password
Encrypt a PDF with a password so only people you trust can open it — and do it without uploading the file anywhere.
Reviewed by Ismail Sab Ajnalkar · Updated July 2026
File Transmute encrypts PDFs on your device. Set a password and File Transmute applies standard PDF encryption locally, so neither your file nor your password is ever sent to a server — a real privacy advantage over cloud tools that receive both.
Best for
- Locking a bank statement, payslip, or contract before emailing it
- Adding a password to a document with personal or confidential data
- Securing a PDF shared over an unencrypted channel
Good to know
Adds password encryption to a PDF so it can't be opened without the password — all on your device, so the file and password are never uploaded. Keep the password safe: because we never see it, we can't recover or reset it for you. To remove a known password later, use Unlock PDF.
How to convert PDF → Password-Protect
Drop your PDF into the tool above.
Type the password you want to set.
Click Protect to download the encrypted PDF.