Rorippa indica (L.) is an annual herb of the Brassicaceae family that has the potential as a traditional medicine. In this research, the antioxidant, and antidiabetic effects of R. indica were systematically studied by computational and experimental techniques. The prepared methanolic extract of R. indica (MRI) was fractionated with petroleum ether (PRI), dichloromethane (DRI), ethyl acetate (ERI), and distilled water (WRI). The total phenols (TPC) and flavonoids (TFC) of the extract and fractions were measured applying the Folin-Ciocalteu and AlCl3 methods, respectively, and the ERI fraction showed the highest TPC and TFC values. Spectrophotometric techniques estimated the total antioxidant capacity and ERI showed the highest antioxidant (IC50: 30.35±3.58 µg/ml in DPPH, EC50: 24.98±7.11 µg/ml in FRPT) potentials. In an in-vitro antidiabetic investigation, ERI demonstrated maximum α-glucosidase and α-amylase inhibitory action where the IC50 values were 25.13 and 19.96 μg/ml, respectively. Further, the GC‒MS study revealed 23 compounds, among them molecular docking of (±)-Kusunokinin (C2) exhibited the highest binding scores with antioxidant (2HE3) (-6.6 kcal/mol), antidiabetic α-glucosidase (5NN5) (-8.3 kcal/mol), and α-amylase (4GQR) protein (-8.0 kcal/mol), respectively. Molecular dynamics by YASARA demonstrated that the complex C2 had an initial higher RMSD trend, reduced its profile after 30 ns, stabilized after 40 ns, and maintained a stable state until 100 ns. Moreover, the ADMET results depicted the non-hepatotoxic, and well-absorbed behaviour. In contrast, the PASS prediction and drug-likeness data revealed their effectiveness as antioxidant, antidiabetic, and anticancer agents, and excellent oral bioavailability. Overall, the R. indica plant could be an expected source of lead compounds for the discovery and advancement of a fresh potential drug.