During the 2014 indoor season Visser set Dutch indoor junior records in both the 60 m hurdles and the pentathlon; , her pentathlon score of 4268 points ranks her ninth on the world all-time junior list. Outdoors, Visser competed in the Götzis Hypo-Meeting for the first time, scoring a personal best 6110 points and placing 14th. At the 2014 World Junior Championships in Eugene, Oregon she took part in both the heptathlon and the 100 m hurdles, winning bronze medals in both events; in the hurdles she broke 13 seconds for the first time, her time of 12.99 (+1.9) setting a new Dutch junior and under-23 record. Visser qualified for her first senior European Championships that summer, representing the Netherlands in the 100 m hurdles; she ran 13.12 (-2.0) in the heats and was narrowly eliminated from the semi-finals.