Tools

There are many tools that are available online to test a website for WCAG 2.0 conformance. These are just a few.

Dashboards

Siteimprove

http://siteimprove.com/

Comprehensive a11y-checker, spell-checker, link-checker and more, all rolled into an enterprise-grade dashboard for managing content and fixes. 

• SiteImprove Workshop

Pa11y - Open Source a11y Dashboard

http://pa11y.kalamuna.com/

A hosted Open Source a11y-checker, able to run on timed intervals and produce reports. Supports multiple sites and URLs (by creating an entry for each URL).

Toolbars, Plugins & Bookmarklets

Lighthouse

https://developers.google.com/web/tools/lighthouse/

Easily audit pages that require authentication, and read your reports in a user-friendly format. It has a Chrome and Firefox plugin. It also be run as a node package or on the command line. 

aXe 

https://www.deque.com/products/axe/

Free, open-source accessibility testing tool that runs in your web browser (Firefox and Chrome).

WAVE Toolbar

https://wave.webaim.org/toolbar/

Chrome extension and Firefox plugin. In addition to flagging errors and alerts, it also provides nifty tools like "Text only" and "Outline" modes.

HTML_Codesniffer

http://squizlabs.github.io/HTML_CodeSniffer/

JS bookmarklet that works with all browsers. Provides clear results with links to appropriate WCAG 2.0 documentation and suggested fixes.

tota11y Accessibility Visualization Toolkit

http://khan.github.io/tota11y/

Can be used and installed as a bookmarklet OR it can be inserted directly into a webpage using a simple bit of Javascript. It's Open Source, licensed under MIT and forkable on GitHub. 

Contrast Checkers 

WebAIM Color Contrast Checker

http://webaim.org/resources/contrastchecker/

Snook's Color Contrast Check

http://www.snook.ca/technical/colour_contrast/colour.html

Contrast Ratio

https://leaverou.github.io/contrast-ratio/

Accessibility Color Wheel

http://gmazzocato.altervista.org/colorwheel/wheel.php

APCA Contrast Calculator

https://www.myndex.com/APCA/

Checklists and Guides

Access Guide

https://www.accessguide.io/glossary