Skip to main content
Opens a WhatsApp chat to that number with the message already typed. The person scanning still presses send, so nothing is sent without them.

​
The number format is strict

Digits only, with the country code, and nothing else:
  • No +, no spaces, no brackets, no dashes
  • No leading zero — an Australian 0400 000 000 becomes 61400000000
  • No 00 international prefix either; the country code alone is enough
A wrongly formatted number does not error. It opens WhatsApp on a chat to nobody.

​
Encode the words, bind only the ID

text= has to be URL-encoded, and QRtub does no encoding. So write the static part already encoded, and bind only a value with no spaces in it:
%20 is a space. Never bind a description or a note — the first space breaks the link.