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What is Accessibility Testing (a11y)

Definition

Accessibility testing (a11y) evaluates whether software can be used by people with disabilities, verifying that an application works with assistive technologies such as screen readers and meets standards like WCAG so that visual, motor, auditory, and cognitive impairments do not block access.

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Ensures people using screen readers, keyboards, or other assistive tech can use the product
Reduces legal exposure by meeting standards such as WCAG and the ADA
Expands the reachable audience by removing barriers for users with disabilities
Improves overall usability since accessible design tends to benefit everyone

Real World Example

A bank tests its online portal with a screen reader and keyboard-only navigation, discovering that unlabeled form fields block visually impaired users, then adds ARIA labels so those customers can complete transactions independently.

FAQs

What standards guide accessibility testing?

The Web Content Accessibility Guidelines (WCAG) are the primary reference, defining criteria across perceivable, operable, understandable, and robust principles.

Can accessibility testing be automated?

Automated tools catch many issues like missing labels or low contrast, but manual testing with assistive technology is needed for full coverage.

Who benefits from accessibility testing?

Users with visual, motor, auditory, or cognitive disabilities benefit most, though accessible design improves usability for all users.