Show HN: Tree-merge.com. Merge e-commerce categories with a web UI

Hello,

I built this web UI to merge multiple tree based e-commerce categories into one "super tree".

You can export the super tree as JSON, and import it into another system such as a search engine.

Users can then select a single category and view items from all of the semantically equal categories.

The app is here: https://app.tree-merge.com/

You can download the sample categories and use them to demo the UI.