I discovered this site that allows you place and remove products from the B-tree and teaches you aesthetically exactly what the B-tree appears like:

java b-tree

I am searching for another website or program such as this. This website doesn't permit you to specify a b --tree of order 4 (4 pointers and three elements), it only allows you specify B-trees by having an even quantity of elements. Also, if at all possible, Let me have the ability to place letters rather than amounts.

I believe I really found another site but which was not long ago and should not think it is any longer.

Found one here, but it is different one I discovered before. I question if you will find any others?

b-tree simulation