Using Google Maps Offline

I need to utilize the Google Maps API. I just found out a minute ago though, that it requires a key, therefor rendering useless until the site is online. I can't constantly upload the site every time I test开发者_运维技巧 a change because it could break some of the pages if I make a mistake. In fact, at this point in time, I don't have a hoster or a domain name because my client has yet to decide on where he wants to host it. I have to have the site 100% complete to show him the entire functionality.

How do I develop the Google Maps part without having it hosted online?

I'm using it in ASP.net...

You can just go to the API Key signup page and request a key for http://localhost.

I haven't tested it myself, but from what I read it works perfectly this way.