This study aims to explore how CSR-related messages posted by CEOs on social media are beneficial in fostering social capital, which in turn impacts the FP and online reputation of the firm. The study also examines whether there is any difference in FP due to sharing of CSR-related messages by CEOs before and during the pandemic. Hierarchical regression is used to examine the influence of CEOs CSR related tweets on FP and online reputation. The study reveals that by posting CSR-related messages on Twitter, CEOs can build social capital available on social media, which leads to better FP and online reputation. Findings also indicate that there is no statistically significant difference in FP and online reputation of the firm due to sharing of CSR-related messages by CEOs before and during the pandemic. Our research makes a significant addition to the empirical studies of CSR, social media and social capital theory.