Converting old SQL 2000 Non-Ansi code to SQL 2012 compatible
The best match to your requirement that I can think of is the Query Designer in SSMS. 

You can open the designer by right-clicking any table in your database and selecting "edit top 200 rows".



Then, open the SQL pane by clicking the button in the toolbar:



Now you can paste your statement in the SQL pane and use the syntax checker to convert the code:



The converted code goes like this:



As you may have noticed, many things are wrong here:


all formatting is gone
wildcards are expanded. This may actually be a good thing.
Unnamed expressions are named with wonderful random names such as "Expr1".
The syntax checker may rewrite your query in ways that don't match the initial code (see this connect item, for instance)


This method (and any other automated method) is not 100% bulletproof and can be used as a starting point to help you in the process, but it definitely needs manual intervention and extensive tests on the converted code.