What is Web Accessibility?

Web accessibility is the practice of making webpages and web applications inclusive and usable by everyone, ensuring that all users have equal access to information and functionality.

Guiding principles were conceived to inform the development of an accepted international standard for web accessibility, known as Web Content Accessibility Guidelines (WCAG 2.0). According to these principles, anyone who uses the web must have content that is:

  • Perceivable: Users must be able to perceive information and user interface components, whether by sight, hearing, or touch.
  • Operable: Users must be able to find, navigate through, and interact with elements such as menus or forms, using a range of input methods or devices.
  • Understandable: Web content should make sense and sites should behave in predictable ways. Feedback to the user, eg. error messages, should be clear and helpful.
  • Robust: Content must be interpreted reliably by a variety of devices, operating systems, and browsers, including assistive technologies.

WebAIM provides a Quick Reference, as well as an in-depth look at the POUR principles.