WCAG 2.1 AA Web Accessibility Checklist (Quick Reference)

This checklist uses The Web Content Accessibility Guidelines (WCAG) as a reference point. The WCAG is a shared standard for web content accessibility for individuals, organizations, and governments.

A: Essential If this isn’t met, assistive technology may not be able to read, understand, or fully operate the page or view.

AA: Ideal Support Required for multiple government and public body websites. Organizations should strive for AA compliance.

AAA: Specialized Support This is typically reserved for parts of websites and web apps that serve a specialized audience.

This checklist targets many, but not all level A and AA concerns. Note that the different levels of WCAG support do not necessarily indicate an increased level of difficulty to implement.

Here is the checklist:


Use plain language and avoid figures of speech, idioms, and complicated metaphors

3.1.5 – READING LEVEL (Level AAA)

Content should be written as clearly and simply as possible. The intent of this Success Criterion is:

  • to ensure that additional content is available to aid the understanding of difficult or complex text;
  • to establish a testable measure indicating when such additional content is required.

Make sure that button, a, and label element content is unique and descriptive


Terms like “click here” and “read more” do not provide any context. Some people navigate using a list of all buttons or links on a page or view. When using this mode, the terms indicate what will happen if navigated to or activated.

Use left-aligned text for left-to-right (LTR) languages, and right-aligned text for right-to-left (RTL) languages


For the visual presentation of blocks of text, a mechanism is available to achieve the following:

  • Foreground and background colors can be selected by the user.
  • Width is no more than 80 characters or glyphs (40 if CJK).
  • Text is not justified (aligned to both the left and the right margins).
  • Line spacing (leading) is at least space-and-a-half within paragraphs, and paragraph spacing is at least 1.5 times larger than the line spacing.
  • Text can be resized without assistive technology up to 200 percent in a way that does not require the user to scroll horizontally to read a line of text on a full-screen window.

Reference: Checklist - The A11Y Project