Annotated list of Accessibility Assessment Tools

There is a wide array of tools available for running accessibility tests. Each QA Engineer gets to work with their favorites. Here are some of our opinions and observations we’ve developed while using them.
NameTypeInternet LocationCommentsFavorite of
Contrast Checker
offers suggestions if your colors fail contrast
Robin Magritte
Coolors Color Contrast Checker
Contrast Checker
Offers suggestions for how to fix colors that fail the contrast ratio
Deque Color Palette Contrast Checker
Contrast Checker
Allows for the selection of up to 5 colors to create a palate for comparison, definitely faster for comparing combinations of multiple colors against one another
EightShapes Contrast Grid
Contrast Checker
Allows for defining and labeling any amount of colors to create a palette for comparison. Produces a (very large) URL for sharing your palette.
Robin Magritte
Esse.Tools Color Contrast Checker
Contrast Checker
Is connected to resources for WCAG success criterion for 1.4.3 and for 1.4.6
Lea Verou Contrast Ratio
Contrast Checker
provides data about relative luminance
Robin Magritte
TPGi Colour Contrast Analyser (CCA)
Contrast Checker
* Downloadable tool * Indicates if a color contrast passes AA text contrast minimum, AAA text contrast minimum, and AA non-text contrast minimum
WebAIM (Web Accessibility in Mind) Contrast Checker
Contrast Checker
* Has a color dropper feature * Shows what this looks like for normal text, large text, and graphics * Linked to other tools and resources
Rebecca Testrake
WSF&W Color Contast Ratio Calculator
Contrast Checker
Has a table of colors displayed with ratio numbers to provide a visual example
Accessibility Developer Guide: Semantics
Explains what Semantics are and why they are important
axe DevTools
SemanticsContrast Checker
This one is a huge favorite. Runs tests and generates reports on what’s broken, the degree of severity, and offers solutions on how to fix.
Robin MagritteRebecca Testrake