Why it matters
Accessibility is both an ethical responsibility and increasingly a legal requirement in many jurisdictions. Automated checks cannot find every accessibility issue, but they consistently surface the most common and impactful ones — the issues that affect real users every day.
Images and alt text
Every informative image needs a meaningful alt attribute. Decorative images should use empty alt (alt="") so screen readers skip them. Missing alt text is one of the most common and most easily fixed accessibility issues on the web.
Form labels
Every form input needs an associated <label> element connected via matching for and id attributes. Placeholder text does not substitute for a label. Without labels, screen reader users cannot understand what a field expects.
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Heading structure
Headings create document structure that screen reader users rely on to navigate. Use a single h1. Do not skip heading levels — going from h2 directly to h4 breaks the logical hierarchy. Headings should describe the content that follows, not just look large on screen.
Keyboard navigation
Everything interactive — links, buttons, forms, dialogs — must be reachable and operable with a keyboard alone. Check that focus indicators are visible, the focus order is logical, and modals trap focus correctly.
Color contrast
Text must have sufficient contrast against its background. WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Many designs fail this on their muted or placeholder text colors.
Quick Checklist
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