Emotion regulation (ER) flexibility is defined as the ability to match ER strategies to situational demands. Several components of flexibility have been identified, such as the ability to detect the presence or absence of contextual cues (i.e., context-sensitivity), the ability to use flexibly diverse strategies (i.e., repertoire), and the ability to monitor and adapt strategies (i.e., feedback). The goal of this study was to validate French versions of the Context-Sensitivity Index (CSI) and the Flexible Regulation of Emotional Expression (FREE) scale. This online study comprised questionnaires designed to analyse the psychometric properties of the two questionnaires in a French population (N = 397). Both scales show satisfactory internal consistency (with ω = 0.81 for the FREE), convergent validity and acceptable test-retest validity (with 0.81 for the FREE; 0.71 for the CSI). Our findings support the hierarchical and four-dimension structures of the FREE scale, with all approximate fit indices demonstrating adequate model fit (CFI = 0.94; RMSEA = 0.05; Chi-square = 1450.656, df = 120, p < .001). Common limits of self-reported measures are associated with this study. Moreover, our results should be replicated in future studies. The French versions of the CSI and FREE scale can be considered as adequate instruments for assessing context-sensitivity and repertoire as components of ER flexibility.