LockMark gives every recipient their own personalized, encrypted copy of your PDF — each carrying an invisible mark only you can read. Share with confidence, and always know which copy went to whom. All on your Mac. Nothing uploaded, ever.
Personalize a document, share it, and always know whose copy is whose.
Turn one PDF into a personalized copy for each recipient — each with a confidential cover page and an invisible mark, sealed with AES-256 encryption.
Hand each person their own copy and keep a private log of who received which — no accounts, no cloud, nothing leaves your Mac.
Got a copy back and not sure whose it is? Drop the PDF in and LockMark reads its hidden mark to tell you which recipient it belongs to.
The marking and the encryption all run locally. No accounts, no servers, no telemetry — even the license is verified right on your device.
Buy LockMark once and it's yours. Pro and Enterprise add more when you're ready.