I just want to throw in my recent experience with crimping JST-XH connectors.
I saw that Amazon hat two different sets of JST inserts, housings and PCB mount connectors, including a crimp tool, where one set gave the name of the crimper, while the other one did not.
Reading this thread, that SN-28B is not really meant to be used for dupont, i stupidly assumed (yeah, yeah, i know

) that that one would work for JST.
Well, it doesn't :p
The jaws of the SN-28B are just too wide to be used on the JST connector, the front-part gets squished. Having no experience with crimping, it took me some time, many destroyed crimps, and a couple of videos, to realize what my issue was.
There is another set though, with an unnamed crimper. That one turned out to be a SN-01BM, with a much narrower jaw. This fits the connector as it should, and now knowing more about crimping, i got an adequate crimp on the first try.