Web Accessibility Standards, Checks

There are a wide variety of web accessibility checking tools available online.  These tools range from web browser plugins and online services, to software applications. Here is a small list:

1. AChecker (Opens in new window) (https://achecker.achecks.ca/checker/index.php)
2. WAVE (Opens in new window) (https://wave.webaim.org/)
3. Pa11y (Opens in new window) (https://pa11y.org/)
4. Axe (Opens in new window) (https://www.deque.com/axe/)
5. Tingtun Checker (Opens in new window) (http://checkers.eiii.eu/en/pagecheck/)
6. Accessibility Check (Opens in new window) (https://www.experte.com/accessibility)

Go through a multi-page resource (opens in a new window) (https://www.w3.org/WAI/demos/bad/) that shows an inaccessible website and a retrofitted version of this same website.

Additional reference (opens in new window) (https://www.w3.org/WAI/test-evaluate/preliminary/)