TLDR: Add @blank to the end of the URL.
The other day while working on a Carrd site, I wanted to link to another website but I wanted it to open in a new tab. The default behavior in Carrd is that links open in the same tab.
I couldn't find the answer in the documentation, instead I found it in the changeLog and in a tweet that @ajlkn made. So I figured, I'd write a quick blog post.
Open link in a new tab using Carrd
To open a link in a new tab, simply add @blank to the end of the URL. So if you were linking to https://twitter.com/ and you wanted it to open in a new tab. You would do https://twitter.com/@blank.