Modern businesses and organizations cannot operate without an official website. A well-designed website should be informative, visually appealing, and easily navigable to encourage return visits. For many users, the website gives them the first impression and insight into the company's nature, organizational structure and culture, product, or service offerings, and past successes. Usability testing, therefore, enables firms to evaluate how easy their websites are to understand and use. It evaluates user-friendliness, user satisfaction, efficiency, and error detection. Various testing tools – offline/online and legacy/general-purpose – are available. This paper focuses on three online tools - Qualidator, SEOptimer, and Website Grader – used to evaluate the usability or ease of use of the Amazon website