Add password protection to your PDF file.
Drop a PDF file here
or
Your PDF will be encrypted with AES-256-GCM using your password. Use the Unlock PDF tool to decrypt it later. The encrypted file can only be opened with the correct password.
Passwords do not match.
Encrypt any PDF with a password in three simple steps — no software to install, no accounts to create.
Drop or browse to select a PDF file. The file is read entirely in your browser.
Enter and confirm a strong password. This will be needed to unlock the file later.
Click protect to encrypt and download the secured file. Use our Unlock PDF tool to decrypt it.
Your files never leave your browser. All processing happens locally on your device — nothing is uploaded to any server.
Start protecting right away. No sign-ups, no email verification, no passwords — just open the page and go.
No file-size caps, no daily quotas, no watermarks. Protect as many PDFs as you want, as often as you want.
Uses AES-256-GCM encryption with PBKDF2 key derivation — the same standards used by governments and banks.