Literal translation: You are all right / You are everything
More natural translations:
* You are perfect
* You are amazing
* You are awesome
* You are the best
Informal translations:
* You're the bomb
* You're killer
* You rock
The exact translation will depend on the specific situation and how the speaker wants to express their admiration.
It's important to note that "a todo dar" is a colloquial expression in Spanish and is often used to express strong positive feelings. It's a very informal and affectionate way to compliment someone.