Spouses who are EU (European Union) or EEA (European Economic Area) citizens
If your spouse is an EU or EEA national, they can join you in Germany very simply and live and work here without restrictions. You do not need to apply for any special residence permit.
Spouses who are third-country nationals
As a third-country national, your spouse must apply for a visa for family reunion/ spouses joining their partners. If your spouse holds a residence permit for another EU state, they do not need a visa to enter Germany
Citizens of Andorra, Australia, Brazil, Canada, El Salvador, Honduras, Israel, Japan, Monaco, New Zealand, San Marino, Republic of South Korea, the United Kingdom of Great Britain and Northern Ireland and the United States of America don´t have to apply for a visa to enter Germany. Once they are in Germany, they have 90 days to apply for a residence permit.