According to your nationality, your situation and the length of your stay, you will need to obtain a visa to study or do research in France or to return to France after graduation.
You are a European student
If you are a national of a country in the European Economic Area (EEA - European Union (EU) countries + Iceland, Norway, Liechtenstein) or Switzerland, you do not need to obtain a student visa to study or do an internship in France. You can enter France freely, regardless of the duration of your stay or your studies.
However, you must be covered by a sickness and maternity insurance and have sufficient resources to support yourself (and any accompanying family members).
EU/EEA/Swiss citizens can work during their studies in France without a residence permit up to a limit of 964 hours per year.
You are a Non-EU student (including UK)
If you are a national of a country outside the European Economic Area (EEA - European Union (EU) countries + Iceland, Norway, Liechtenstein) or Switzerland, you must obtain a visa to come to France to study, do research or do an internship.
Different types of visas exist. You must apply for your visa according to the reason for your visit (study, research or internship) and the duration of your stay in France.
The Visa Wizard on the official French visa website will help you to determine which type of visa is required for your stay in France :
The long-stay student visa Your stay is longer than 3 months: you must apply for a long-stay student visa to study, conduct research or do an internship in France. There are two types of long-stay visas : - the long-stay visa valid as a residence permit (VLS-TS)
You are a teacher-researcher from Europe (28 EU Member States + Iceland, Norway, Liechtenstein and Switzerland): you are exempt from visa and residence permit requirements. Only a valid identity card or passport is required.
You are a Non-European (including UK) teacher-researcher
If you are a teacher-researcher from a country outside the European Economic Area (EEA - European Union (EU) countries + Iceland, Norway, Liechtenstein) or from outside Switzerland and are coming to a French university for the first time: you must obtain a Researcher Talent Passport Visa (Passeport Talent Chercheur). Please contact the French Consulate or Embassy in your country of residence for more information.For more information, visit the official website for visas for France : https://france-visas.gouv.fr
There is an official website for visas for France : https://france-visas.gouv.fr/N. Do not hesitate to consult it to obtain all the information you need to prepare your study period in France.