In America, 61 million people currently live with disabilities; globally that number reaches over a billion, according to the World Health Organization (WHO) (WHO/Y. Shimizu, Disability and Health). Testing your software to ensure that every person, disability or not, can browse and engage with your website is known as web accessibility testing. These disabilities include vision, physical, cognitive, literacy, and auditory disabilities. Understanding the unique testing considerations for each can be overwhelming, however, that understanding is important when creating your accessibility testing plan. In this article, I’ve outlined the importance and types of accessibility testing, specific things you can test for, and free tools that can help you execute your tests.