Web accessibility is crucial in ensuring that websites are usable by all users, including individuals with disabilities. A web accessibility checklist for developers outlines best practices and standards to follow, such as providing alternative text for non-text content, keyboard accessibility, proper color contrast, easy navigation, etc. The Web Content Accessibility Guidelines (WCAG) are based on four principles: perceivable, operable, understandable, and robust. These guidelines help developers create a more inclusive online experience for everyone, including those with disabilities. A web accessibility checklist is a set of criteria or measures that validate the accessibility of a website in terms of accessibility standards. Web developers refer to this checklist when developing and designing websites or apps for accessibility.