Janni Thomsen is a 27-year-old professional football player from DEN. He currently plays for Utah Royals Women, wearing the number 7 shirt. At the international level, he represents Denmark Women. He plays primarily as a Defender. He stands at 167cm tall and weighs 55kg.

His most recent move was a Free from VSK Aarhus(w) to Valerenga Women on 2020-06-30.

Throughout the United States Women's National Soccer League 2025, Janni Thomsen featured in 26 matches, averaging 1.8 tackles, 0.8 interceptions, and 2.3 clearances per game, while blocking 0.2 shots per game.