Nothing
numnodes.tree(c("((hg18:0.142679,(mm9:0.083220,rn4:0.090564):0.269385):
0.020666,canFam2:0.193569);",
"(human, (mouse, rat));"))
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.