I am surprised that none of the many tools I just tested offers this functionality.
See this image for comprehension: enter image description here

The user is supposed to be able to make any of the cards a category.
Anyone have a suggestion?

(Of course a test in real world would be better, but the requirement ist web-based)

  • 1
    Hi Big_Chair. What is your question? Are you asking if something like this exists? How to implement something like this?
    – Tory
    Nov 10, 2016 at 17:15
  • 1
    Traditional card sorts do not provide the instruction that a participant can "make any of the cards a category", which is why you are not finding tools that support the functionality. A card sort either (1) asks the user to define categories themselves, or (2) provides defined categories for the participant to sort into. Nov 10, 2016 at 17:20
  • 2
    as @EvilClosetMonkey says, this isn't sorting, it's nesting.
    – Confused
    Nov 11, 2016 at 6:05

1 Answer 1


I recommend Optimal Workshop. This is a screenshot of their card sorting tool (Called Optimal Sort)

Here is a screenshot of the tool: enter image description here

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