There is also https://bplustree.app/ and https://btree.app/

From what I can tell these two are a little more polished than the main linked one, including features to add random values and trace lookups/range finding through the nodes checked.

I beg of devs, use this (or others as another comment mentioned) to visualize what the poor RDBMS has to deal with when you use non-k-sortable PKs.

UUID was a mistake :-)

I would love an "insert random", or a prefilled / demo mode, or demo set of keys for interesting examples.

Kind of wish you could drop a list in there, and have it step through.

Hasnt this been around for a while now?