9 best JavaScript Accessibility Testing libraries in 2025

Accessibility testing is crucial to ensure a product is usable by the majority of its target audience. The disabled community represents around 15% of the U.S population, but it is still often overlooked in design and testing efforts. Plus, accessibility testing is not just about people with disabilities, it also aims at making products usable by older people or users with temporary disabilities (e.g., when using a phone with one hand). In this kit, we will review the best JavaScript Accessibility Testing libraries available pa11y - Pa11y is your automated accessibility testing pal; spearmint - accessibilityfirst GUI for generating clean; quail - Accessibility testing in the browser and on the server.