Libraries want and expect great content that's discoverable and accessible to all. Increasingly, libraries are under the gun to provide universally accessible interfaces for users, and the selection process is a great time for evaluating what products bring with them when they come out of the box. What are some practical steps any professional involved in the selection process can use to ensure the interfaces and content is fulfilling that vision? This deep dive workshop builds a foundation of accessibility and usability best practices and includes hands-on activities. Participants will walk away knowing how to identify accessibility and usability issues in interfaces and the tools to communicate them professionally. No experience with web development is required, and all levels of experience are welcome.