The main focus of this research is to examine the changes in engine performance, combustion and emissions caused by The escalating fuel prices, driven by population growth and the proliferation of vehicles, underscore the urgent need to seek alternate fuels. The detrimental environmental consequences of fossil fuel consumption, including global warming, the greenhouse effect and acid rain, accentuate the importance of transitioning towards cleaner energy sources. This study focuses on the experimental research of jackfruit seed oil as a potential biodiesel. The biodiesel is extracted from jack fruit peel and jack fruit seeds. The extracted oil is sent through the transesterification and converted into biodiesel. The conversion of jack fruit peel of seed oil is 97. Methyl ester is poured into the compression ignition engine to identify the actual performance, real time combustion and exhaust gas analysis. Experiments were done on a single cylinder TV1 Kirloskar diesel engine. The depicted results were observed that enhanced brake thermal efficiency for a blend containing 10 jack fruit biodiesel (BE10) and significantly reduced emissions, highlighting its promise as a sustainable and environmental friendly fuel. From the emission point of view BE 40 is highly recommended. All blends of biodiesel oxides of nitrogen are increased, this can be reduced by employing EGR technique. © 2025 Elsevier B.V., All rights reserved.