A series of 4-thiazolidinone derivatives (1–18) was synthesized and tested in vitro for its antimicrobial and anticancer potential. Synthesized compounds were found to be 5 more potent antimicrobial agents than anticancer agents. Anticancer screening results indicated that compound 13 (IC50 = 15.18 μM) was the most active anticancer agent and was more potent than the standard drug, carboplatin (IC50