The concept of justice, though inherently universal, is subject to substantial influence from social factors, affecting its perception. This study is dedicated to the adaptation and validation of an assessment tool for Global Belief in a Just World Scale (GBJWS) in the Spanish context. Our investigation delves into the relationship between Belief in a Just World and key constructs such as Social Dominance, System Justification, and Right-Wing Authoritarianism, while also addressing the dimension of potential gender disparities. Our findings demonstrate robust reliability coefficients, attesting to the scale's aptitude for assessing GBJW and exhibit highly favourable adjustment indices. Notably, our score analysis reveals elevated levels of BJW among men. This comprehensive research endeavour offers an invaluable global metric, facilitating transnational studies for understanding of justice perceptions on a global scale.