You may already know about WAVE, which is one of many free tools that helps you check the accessibility of a website or single web page.
WAVE® is a suite of evaluation tools that helps authors make their web content more accessible to individuals with disabilities. WAVE can identify many accessibility and Web Content Accessibility Guideline (WCAG) errors, but also facilitates human evaluation of web content.
The second clause in that last sentence is some way from being written in clear language, but it is important.
WAVE is fantastic at automatically picking up errors in your website. But you – dear human – must be the one to look for and identify accessibility issues more generally, and especially with your content.
Watch the 11-minute explainer video to get a good introduction to WAVE. Then head to the home page, enter a web address and poke around to see how it works hands on.
