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Google offers three geocoders:

The first[1] converts ip to location, and allows 100 free queries per day.

The second[2] converts physical addresses to location as part of it maps JavaScript api, and is part of its 25,000 free requests/day.

The third[3] is its http version of geocoding, which also converts physical addresses to locations or visa-versa. This api has the 2,500 req/day limit.

[1]https://developers.google.com/maps/documentation/business/ge...

[2]https://developers.google.com/maps/documentation/javascript/...

[3]https://developers.google.com/maps/documentation/geocoding/

Also note that Google's geocoder can only be used for results to be displayed on a Google map (mentioned in emptystacks's link, also section 10.1.1 (g): https://developers.google.com/maps/terms)

Google's API is for a very different thing: it converts an address to a lat/long and vice-versa.

you can fork it and run it on your own servers without the limit..