How to improve the accessibility of your website

Start with the fundamentals that actually move the needle: proper heading hierarchy, descriptive alt text, and sufficient color contrast. Many sites fail on these basics because they're easy to overlook during design and development. Use heading tags (H1, H2, H3) in logical order—not for styling—so screen reader users understand your content structure. For alt text, describe what's in the image and why it matters to the page; "image of graph" is useless, but "conversion rate increased 34% after implementing video content" tells users what they need to know. Test your color combinations against WCAG AA standards (a contrast ratio of at least 4.5:1 for text). Tools like WebAIM's contrast checker make this trivial to verify, so there's no excuse for failing here.

Next, focus on keyboard navigation and form usability since these directly impact how non-mouse users interact with your site. Every interactive element should be accessible via Tab key, and users need visible focus indicators so they know where they are. Form fields must have associated labels (not just placeholder text), and error messages should clearly explain what went wrong and how to fix it. This matters for your clients' conversion rates too—users on mobile, in bright sunlight, or with accessibility needs all benefit from clear forms. Test by navigating your entire site using only your keyboard; if you get stuck, your users will too.

Finally, implement ARIA labels thoughtfully where HTML semantics fall short, but don't overuse them. ARIA is powerful for dynamic content and complex components, but it's often a band-aid for poor HTML structure. Make sure your development team understands that semantic HTML (using `<button>` instead of `<div onclick>`), proper list markup, and landmark regions do most of the heavy lifting. Run automated testing with tools like axe or WAVE to catch obvious issues, but understand that automated tools only find about 25% of accessibility problems. Manual testing with real assistive technology users (or at minimum, testing with screen readers yourself) reveals issues automation misses.

For your agency or freelance business, accessibility isn't just compliance—it's good practice that improves usability for everyone while reducing liability risk for your clients. Build these habits into your standard QA process, and they become invisible maintenance rather than expensive retrofitting later.