Protect PDF

    Free Tool

    Encrypt your PDF locally with a password and download a protected .pfh file.

    Note: This creates a password-protected container file (.pfh), not native PDF password encryption.
    Privacy first: this tool runs fully client-side. If you do not trust us, turn off your internet, do your task, then close this browser — that ensures 100% offline processing.

    Use the matching Unlock PDF tool to decrypt .pfh files back to standard PDF.