try using google translate tool. these days google also provide hindi translation. like when you type "Kya kar rahe ho" it'll be automatically converted in Hindi. isn't it amazing!
Here you go: http://www.google.com/transliterate/indic If you have self-hosted wordpress blog then use these plugins: http://teck.in/google-indic-transliteration-wordpress-plugin.html http://www.monusoft.com/Products/WordPressPlugin/tabid/187/Default.aspx