You can try the DELF diploma for the levels A1-B2.
You can find easily information by googling.
The principal page is:
http://www.ciep.fr/delf-dalf
or
http://www.ciep.fr/en/delf-dalf
In brief, B1 is the minimum level required by French universities in order to accept a student, although they are some disciplines that they demand level C1 (DALF).
For information about the classification of language levels see here for instance:
https://www.france-langue.fr/niveaux-de-francais/
https://www.coe.int/en/web/common-european-framework-reference-languages/level-descriptions
There are also other diplomas recognized in France and abroad as well such as Test de Connaissance de Langue Française.
http://www.ciep.fr/tcf