Diabetes mellitus is a persistent metabolic ailment characterized by elevated blood glucose levels and disruptions in the metabolism of carbohydrates, lipids, and proteins. This condition hinders body's capacity to regulate blood glucose, resulting in hyperglycemia, the hallmark of diabetes mellitus. The present study the development of an anti-diabetic polyherbal syrup formulated using an extract derived from the dried seeds of Syzygium cumini L. and Tinospora cordifolia. The resulting product was subjected to comprehensive evaluation. The evaluation encompassed phytochemical analysis to identify key bioactive compounds. 03 batches of Polyherbal syrup formulations were developed using extracts of Syzygium cumini L. and Tinospora cordifolia. Formulation F1 to F3 were prepared using Propylene glycol, Methyl paraben, Peppermint oil, Erythrosine and Saccharin sodium. Developed formulations were evaluated for various evaluation parameters for syrup such as Organoleprtic properties evaluation, Determination of pH, Viscosity Measurement, density and specific gravity. Results showed that, Formulation F2 showed good hypoglycemic effect in wistar rats compared to diabetic control group. F2 formulation was found to be stable compared to F1 and F3. It was discovered that there was a clear correlation between the extracts' ability to adsorb glucose, on the basis of this developed formulation shown hypoglycemic activity in STZ induced diabetic wistar rats as compared. It is needed to be scaled up on pilot scale; also clinical trials are necessary to carry out the successful launching of Java plum syrup formulation for management of diabetes mellitus.