What is the difference between你好 and 您好?

你："you"

您：polite “you”, it's like “usted” in Spanish.

so, 你好 means “hello”， literally translated as “you well”

您好 also means “hello” but more polite and formal. literally translated as “usted bien” in Spanish

您好 is a polite way to say 你好。We usually use 你好 to say hello to Chinese, but when you want to greet a person of senior generation or higher status, for example your parents' friends or your boss, you could use 您好 to show your repects. 

你好不是汉文但是您好事汉文， 表示尊重。