What WCAG level should I target?

Target WCAG 2.2 Level AA for most websites. Level A covers basic critical requirements, while AA adds the most impactful accessibility barriers. Level AAA is aspirational and not required for legal compliance in most jurisdictions.

Does fixing accessibility issues improve SEO rankings?

Yes. Many accessibility improvements directly align with SEO best practices: proper heading structure, descriptive link text, image alt text, semantic HTML, and fast loading times. Sites with strong accessibility often see measurable improvements in organic search performance.

Is web accessibility legally required?

Yes, in many jurisdictions. The ADA applies to websites in the US, the European Accessibility Act (EAA) requires compliance in the EU, and similar laws exist in Canada, Australia, and the UK. Non-compliance can result in lawsuits, fines, and reputational damage.

How to Improve Website Accessibility: Complete WCAG Guide

Q: What is WCAG and why is it important for SEO?

WCAG (Web Content Accessibility Guidelines) is the global standard for web accessibility. It is important for SEO because many accessibility best practices — like proper heading hierarchy, descriptive alt text, and semantic HTML — are also positive ranking signals for search engines.

Q: How do I check if my website is WCAG compliant?

Use an AI-powered tool like Scanly that includes accessibility auditing in its scan. It will check color contrast, alt text, heading structure, ARIA attributes, and keyboard navigation. Manual testing with screen readers and keyboard-only navigation is also recommended for thorough verification.

Website accessibility ensures that people with disabilities can perceive, understand, navigate, and interact with your website. With over 1.3 billion people worldwide living with some form of disability, ignoring web accessibility excludes a massive audience. Beyond the ethical imperative, accessibility directly impacts your SEO rankings — many accessibility best practices overlap with search engine ranking signals. This complete WCAG guide walks through exactly how to improve your website accessibility, from automated audits to manual testing and remediation. This article expands on our WCAG checklist with deeper implementation guidance.

Why Accessibility Matters for Your Website

Accessibility affects three critical areas of your online presence:

SEO Rankings — Google rewards accessible websites. Proper heading structure, descriptive alt text, semantic HTML, and fast load times are both accessibility requirements and confirmed ranking factors.
Legal Compliance — ADA lawsuits against websites increased 320% between 2020 and 2025. The European Accessibility Act (EAA) now requires WCAG 2.2 Level AA compliance for most websites serving EU users.
User Experience & Conversions — Accessible design benefits all users. Captions help users in noisy environments, high contrast helps users in bright sunlight, and keyboard navigation helps power users. Better UX leads to higher engagement and conversions.

Understanding WCAG 2.2 Guidelines

WCAG 2.2 is organized around four core principles, often remembered by the acronym POUR:

Perceivable — Users must be able to perceive the content. This means providing text alternatives for non-text content and creating content that can be presented in different ways.
Operable — Users must be able to operate the interface. All functionality should be available from a keyboard, and users should have enough time to read and use content.
Understandable — Users must be able to understand the content and interface. Text should be readable, web pages should appear and operate in predictable ways, and input assistance should help users avoid and correct mistakes.
Robust — Content must be robust enough to be interpreted by a wide variety of user agents, including assistive technologies like screen readers.

How to Run an Accessibility Audit

Step 1: Automated Scanning with AI Tools

Start with an automated accessibility scan using an AI-powered tool like Scanly. It checks WCAG compliance automatically, identifying issues with color contrast, missing alt text, heading hierarchy problems, ARIA attribute errors, and more. Automated scans catch approximately 30-40% of accessibility issues — they are fast and consistent but cannot replace human judgment.

Step 2: Manual Testing

Manual testing catches what automated tools miss. Perform these checks:

Keyboard-only navigation — Navigate your entire site using only Tab, Shift+Tab, Enter, and Escape. Every interactive element should be reachable and operable.
Screen reader testing — Use VoiceOver (Mac) or NVDA (Windows) to experience your site as a visually impaired user would.
Zoom testing — Zoom to 200% and verify all content is still readable without horizontal scrolling.
Color contrast checking — Use the WebAIM Contrast Checker to verify all text/background combinations meet 4.5:1 ratio.

Step 3: Prioritize and Fix

Rank issues by severity. Critical issues (keyboard traps, missing form labels, insufficient contrast on primary text) should be fixed first. Use the WCAG conformance levels to guide your priorities: Level A issues first, then AA, then AAA. Track your progress with scheduled re-audits.

Common Accessibility Issues and How to Fix Them

Poor Color Contrast

Issue: Text that blends into the background makes content unreadable for users with low vision.

Fix: Ensure a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Use online contrast checkers to verify every color combination used on your site.

Missing Image Alt Text

Issue: Images without alt text are invisible to screen readers and cannot be understood by users with visual impairments.

Fix: Add descriptive alt text to all informative images. Use empty alt attributes for decorative images. Include relevant keywords naturally — this also helps your image SEO.

Improper Heading Hierarchy

Issue: Skipping heading levels (H1 to H3) or using headings for visual styling rather than structure confuses screen readers and search engines.

Fix: Use one H1 per page. Maintain logical hierarchy (H1 → H2 → H3). Never skip levels. Use CSS for styling, not heading tags.

Frequently Asked Questions

What is WCAG and why is it important for SEO?

WCAG is the global standard for web accessibility. It is important for SEO because accessibility best practices — heading hierarchy, alt text, semantic HTML — are also positive SEO signals. An accessible site is inherently more search-engine friendly.

How do I check if my website is WCAG compliant?

Use an AI-powered tool like Scanly for automated accessibility scanning, then complement with manual testing using keyboard navigation and screen readers. No single tool catches every issue.

Does fixing accessibility improve SEO?

Yes. Many accessibility improvements directly align with SEO best practices. Sites that fix accessibility issues often see measurable improvements in organic traffic and search rankings.

Start Improving Your Accessibility Today

Website accessibility is not a one-time project — it is an ongoing commitment to inclusive design that benefits all users and improves your SEO performance. Start with an automated accessibility audit, fix the critical issues first, and establish regular monitoring to maintain compliance. Every improvement you make opens your website to a wider audience and strengthens your search presence.

♿ Check Your Accessibility with Scanly