Background: Medicinal plants have been widely used in traditional medicine for managing chronic diseases. Wrightia tinctoria (Roxb.) R. Br., traditionally utilized in Ayurveda and Siddha medicine, has been reported to possess antihyperglycemic and antioxidant properties. Given the increasing prevalence of diabetes and oxidative stress-related disorders, exploring plant-based therapeutic alternatives is crucial. Aim: This study aims to evaluate the phytochemical constituents, in vitro antihyperglycemic, and antioxidant activities of Wrightia tinctoria leaf extract using advanced analytical techniques. Materials and Methods: The hydroalcoholic extract of Wrightia tinctoria leaves was prepared and subjected to qualitative and quantitative phytochemical analysis using Thin thin-layer chromatography (TLC), UV-visible spectroscopy, and High-Performance Liquid Chromatography (HPLC). The antihyperglycemic activity was assessed using an α-amylase inhibitory assay, while the antioxidant potential was evaluated through DPPH, ABTS, and FRAP assays. Results and Discussion: Phytochemical screening confirmed the presence of flavonoids, phenolic acids, tannins, alkaloids, and glycosides. HPLC analysis identified gallic acid, quercetin, and rutin as major bioactive compounds. The extract exhibited significant α-amylase inhibition, indicating its antihyperglycemic potential. Additionally, strong free radical scavenging activity was observed, suggesting its role in oxidative stress management. Conclusion: The findings validate the therapeutic potential of Wrightia tinctoria in diabetes management and oxidative stress reduction, supporting its traditional use in herbal medicine. Future in vivo and clinical studies are recommended to further explore its pharmacological applications.