A avaliação da eficácia de ferramentas em aconselhamento de carreira é importante para fundamentar uma prática baseada em evidências. O objetivo deste estudo foi avaliar a eficácia do Minha História de Carreira (MHC) – adaptado para uso online – como uma ferramenta de aconselhamento de carreira oferecida a pessoas indecisas em relação à escolha de um curso superior. A amostra foi composta por 7 participantes que responderam a instrumentos pré e pós-intervenção. Escores médios do grupo foram comparados através de testes t para medidas repetidas e resultados individuais foram analisados a fim de descrever outras variações nos escores. De modo geral, os resultados apontaram mudanças significativas em indicadores de desenvolvimento de carreira, principalmente adaptabilidade de carreira.The assessment of the efficacy in career counseling is important to substantiate evidence-based practices. The goal of this study was to evaluate the efficacy of My Career Story (MCS) – adapted to be used online - as a career counseling tool offered to people that are in doubt about their path in college. The sample had 7 participants that answered to instruments pre- e post-intervention. Mean scores were compared using a t-test for repeated measures, and individual results were analyzed, meaning to describe other variations on scores. Overall, the results point to significant changes in career development indicators, mostly in career adaptability.The assessment of the efficacy in career counseling is important to substantiate evidence-based practices. The goal of this study was to evaluate the efficacy of My Career Story (MCS) – adapted to be used online - as a career counseling tool offered to people that are in doubt about their path in college. The sample had 7 participants that answered to instruments pre- e post-intervention. Mean scores were compared using a t-test for repeated measures, and individual results were analyzed, meaning to describe other variations on scores. Overall, the results point to significant changes in career development indicators, mostly in career adaptability