Comparison of F-1 and J-1 Visa Types
Topic F-1 J-1 Eligibility Restrictions None. Cannot be self-funded unless participating in an exchange program pursuant to a formal written agreement between educational institutions or governmental offices. On-Campus Employment Available up to 20 hours per week when school is in session and 40 hours per week during annual school holidays.
https://visaservices.duke.edu/categories/f1-j1-comparison