I am searching lot on web for json file for world cities and country to use in my autocomplete search box.
Exactly how I want is here in the example link below, but it has done using google api, i don't want to use google api i just want to parse my json file to for cities and country.
http://jsfiddle.net/NuCUd/8/
It is not clear what kind of help you expect. The data is available on this site you just have to filter the features you want cities or countries or whatever you are looking for.
There is no global json file. There is a csv extract, we can impossible provide the same data in an infinite number of possible formats. It is quite simple for you to convert it into exactly the format you require.