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Tuberculosis is one of the leading cause of death worldwide and Mycobacterium tuberculosis still remains to be the fatal human pathogen. In pursuit of novel diphenyl ethers as antitubercular and antibacterial agents, a series of novel substituted N‐(3‐hydroxy‐4‐phenoxybenzyl)‐N‐phenylmethanesulfonamides 4 a‐k were rationally designed, synthesized and evaluated for their in vitro antitubercular and antibacterial activities. Compounds 4 j and 4 d appeared to be the most promising against Mycobacterium tuberculosis strain H37Rv with minimum inhibitory concentration (MIC) of 42 μM and 65 μM, respectively. Compound 4 j exhibited good in vitro antibacterial activity with MIC of 6.97 μM, 13.94 μM, and 27.88 μM against Escherichia coli, Bacillus subtilis, and Pseudomonas aeruginosa respectively, indicating it's broad‐spectrum of activity. The safety profile of the compounds was assessed on HepG2 …