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Description: The Big Five Inventory-2 (BFI-2), which categorizes personality traits into five independent bipolar dimensions, has become a popular psychometric tool for measuring personality. This manuscript aims to preregister the validation analysis of the Bangla BFI-2 among Bangladeshi community samples. A large-scale online survey will be conducted to collect data from at least 600 participants. Participants will complete Bangla BFI-2 and NEO Five-Factor Inventory Bangla (NEO-FFI-B). Domain-level structural validity will be investigated using Exploratory Structural Equation Modeling, and facet-level structural validity will be examined using Confirmatory Factor Analysis. A full measurement invariance across gender, educational level, and language (Bangla vs English) will be investigated using 13 models. Item quality will be analyzed using Item Response Theory. Convergent and discriminant validity will be assessed by correlations of the five domains measured using Bangla BFI-2 and NEO-FFI-B. In conclusion, this manuscript proposes validating the BFI-2 among Bangladeshi community samples to facilitate researchers and mental health practitioners to measure personality accurately.