One of the things that I greatly enjoy to the online Cambridge dictionary is the classification of the words and idioms according to Common European Framework of Reference for Languages. So for instance
If something happens out of the blue, it is completely unexpected: One day, out of the blue, she announced that she was leaving.
nevertheless (also nonetheless) B2
despite what has just been said or referred to
and so on. Is there a similar (free) online dictionary that does the same for the French language?