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Website accessibility basics

Website accessibility basics
Photo: Jiròni B., CC0, via Wikimedia Commons

An accessible website works for people who use screen readers, keyboards, zoom or captions. It also tends to be easier for everyone.

What WCAG is

The Web Content Accessibility Guidelines are the international standard. Most organizations aim for WCAG 2.1 or 2.2 at level AA.

Five checks you can do now

  1. Keyboard only. Unplug your mouse. Can you reach every link, button and form field with Tab, and see where you are?
  2. Zoom to 200%. Does the page still work without sideways scrolling?
  3. Images. Do meaningful images have alt text that describes them?
  4. Contrast. Is light grey text on white hard to read? It probably fails.
  5. Forms. Does every field have a visible label, and do errors say what to fix?

About overlay widgets

Widgets that add an accessibility button do not fix the underlying code. Many disabled users find them unhelpful. Fix the site itself.

The law

Requirements depend on your country and sector. In the US, the ADA has been applied to websites in many lawsuits. In the EU, the European Accessibility Act has applied to many online services since June 2025. Ask a lawyer about your situation.

See accessibility audits and fixes.

Questions from readers

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