High performance liquid chromatography (HPLC) is an important qualitative and quantitative method. It is used to identify and quantify potency in drug substances and drug products. Chromatographic methods plays a vital role in the drug discovery, development, formulations and quality control. In this review, it explains that validation process and validation parameters. The parameters described here are according to ICH guidelines and include accuracy, precision, specificity, and limit of detection, limit of quantitation, linearity, range, and robustness