Can I get German work visa in France on French visa?

If you have a 6 month French work visa, you cannot directly apply for a German work visa from within France in most cases. German work visa applications generally need to be submitted from your country of residence or country of legal long term stay.

Since your French visa is temporary and valid for only six months, it does not grant you long term resident status in France. German authorities typically require non EU citizens to apply from their home country or from a country where they hold a long term residence permit.

You may be able to apply for a German work visa at the German embassy or consulate in France only if they accept applications from temporary residents, which is rare. In most cases, you will have to return to your home country to apply.