00Note.com allows you to send someone an encrypted secret message that they must decipher, which can self-destruct and be styled in a variety of ways. Fill out our form and retrieve a link that you can send to your recipient. The difficulty level for the recipient to uncover your message depends on which encryption and self-destruct option you select. If you want to make them work for it, use one of our less obvious encryptions and select a short self-destruct time. This is completely free to use and you can send as many secret notes as you like. You can use our application for sending a love note to a partner or a crush, a funny message to a friend, a unique holiday or birthday greeting, or for any other creative purpose you can think of.