The San Jose Jazz Summer Fest (originally known as the San Jose Jazz Festival) is an annual music festival organized by the non-profit San Jose Jazz and held in Plaza de César Chávez in downtown San Jose, California. The festival was established in 1990 as a one-day, single-stage event. The festival began charging admission in 2006. As of the 2025 edition, the main stage is in Plaza de César Chávez with others nearby .