How to improve website accessibility

Website accessibility isn't just a compliance checkbox—it's a ranking factor Google explicitly considers and a UX improvement that expands your addressable market. Start with the technical foundations: semantic HTML structure, proper heading hierarchy (H1 tags for main content, H2 for subsections), and alt text for all images that describes the content meaningfully rather than just naming the image. ARIA labels and roles fill gaps where semantic HTML falls short, particularly for custom components and dynamic content. Test your color contrast ratios using tools like WebAIM's contrast checker; aim for WCAG AA compliance at minimum (4.5:1 for body text, 3:1 for large text). This alone catches accessibility issues that affect both screen reader users and people with low vision.

Interactive elements require deliberate attention. Ensure all functionality is keyboard accessible—users should navigate buttons, links, and form fields using Tab and Enter keys without needing a mouse. Forms must have associated labels (not just placeholders) so screen readers understand what each field requires. Focus indicators should be visible and clear, not hidden behind overzealous CSS resets. For video content, provide captions and transcripts; this helps deaf users, non-native speakers, and users watching in noisy environments, while also improving SEO value through indexed transcript text. Test your implementation with actual screen readers like NVDA (free) rather than just browser extensions, since real usage patterns often reveal problems simulators miss.

Build accessibility testing into your QA workflow rather than treating it as a post-launch task. Automated tools like Axe, WAVE, and Lighthouse catch low-hanging fruit like missing alt text and contrast failures, but they miss roughly 30 percent of real accessibility problems. Manual testing with keyboard navigation and a screen reader is essential. If you're designing for clients, educate them that accessible design benefits everyone—captions help in loud environments, larger text helps when reading on mobile, and logical structure helps users understand any site faster. Document accessibility requirements in your project briefs and design systems so it's built in from wireframes forward, not retrofitted at the end. This approach reduces rework, improves client satisfaction, and positions your agency as genuinely competent in modern web standards.