If you have a short message for you friend; how will you send it? By sms, email, telegram. Yes these are traditional ways to convey message. Now see this tool for sending message.
shorttext is a free online tool to send a short message. For that you need not to have an account. Just write a message that you want & create a unique URL; you can embed video or photo also in your message & send this link to your frinnd.
When your friend will open this URL he/she will get you message. One can send message privately or can share the message with the world. Visit http://shorttext.com