Missing Type is a free Chrome extension developed by PaSME Pty Ltd that aims to raise awareness about the importance of blood types. Created in support of the Australian Red Cross Blood Service's #MissingType campaign, this extension adds a button to the top left of your web page that, when clicked, shows what the world would look like without the A, B, and O blood types.

By using this extension, users can visualize the impact of missing blood types on our daily lives. The simple button click triggers a visual transformation of the web page, removing the letters A, B, and O from the text. This serves as a powerful reminder of the vital role that blood donations play in saving lives.