Accessibility testing for products everyone can use

Accessibility helps people with permanent disabilities, such as blindness, low vision, deafness, motor impairments or cognitive differences, use digital products independently. These users rely on screen readers, magnification, captions, keyboard navigation and voice control, and poorly built interfaces can lock them out entirely from essential services.

Many more people benefit from the same improvements. Older users with declining eyesight, people with temporary injuries, users in bright sunlight or noisy environments and anyone using a phone with one hand all find accessible products easier to use. Clear structure, readable text and good contrast improve usability for everyone.

There are business reasons too. Accessible products reach larger audiences, perform better in search because of clean structure and descriptive content, and meet procurement requirements in government, education and large enterprises, which often ask vendors for accessibility conformance documentation. Legal expectations are growing in many countries, including requirements for public sector websites and services. Specific obligations vary by jurisdiction and sector, so organizations should confirm which apply to them with their legal advisers.

Effective accessibility testing combines automated tools with expert manual review and testing with assistive technologies. Each method finds different issues, and relying on any single one leaves significant gaps. A typical audit follows the steps below across a representative sample of pages and flows.

Automated scanners, such as axe or Lighthouse, quickly find issues like missing alternative text, low contrast and missing form labels. However, they detect only a portion of accessibility problems, because many issues require human judgment about meaning and usability. Manual testing checks keyboard navigation, focus order, meaningful headings, error messages and dynamic content. Testers use screen readers such as NVDA, JAWS, VoiceOver and TalkBack to experience the product as blind users would.

Testing with people who use assistive technologies daily adds further insight, revealing practical barriers that technically compliant interfaces may still create. Even a few sessions with experienced screen reader or switch users often change priorities significantly, highlighting problems that matter most in daily use and helping teams focus remediation effort where it helps people most.

• Select representative pages, templates and user journeys.
• Run automated scans to catch common issues quickly.
• Test keyboard access, focus order and visible focus.
• Test with screen readers on desktop and mobile.
• Report findings mapped to WCAG success criteria.

Fixing accessibility after launch is far more expensive than building it in from the start. Design systems with accessible components, such as buttons, form fields, dialogs and menus that already handle focus, labels and keyboard interaction correctly, prevent the same mistakes from being repeated across every new feature.

Designers can check contrast, text sizes, touch targets and focus states in their design tools before any code is written. Clear content guidelines for headings, link text and error messages help writers and product managers contribute too. Developers can add automated accessibility checks to their pipelines and component tests, catching regressions before release. Linting rules for frameworks like React flag common issues as code is written, providing feedback at the cheapest possible moment.

Finally, train the team and assign ownership. Short training sessions, an accessibility champion in each team and periodic audits keep standards high as products evolve and new people join. Including accessibility in the definition of done makes it part of normal work.