You would have to really trust whatever service is providing this ssh client. For a browser based ssh client either it's code running on your local computer (i

You would have to really trust whatever service is providing this ssh client. For a browser based ssh client either it's code running on your local computer (in which case, just download an ssh client) or your ssh connection is coming from some third party server that you may or may not trust. This is something I've thought about time and again, but the security issues always seem to outweigh any potential benefit from something like the OP or similar (in my opinion).