Free Website Accessibility Checker
Test any page against WCAG basics — alt text, contrast, labels, ARIA and structure — so your site works for every visitor.
An inaccessible site shuts out millions of users — and increasingly invites legal risk. The siteIQ Accessibility Checker tests any page against core WCAG criteria so you can find and fix the barriers.
Enter a URL to check image alt text, color contrast, form labels, ARIA usage and heading structure, with clear guidance on each issue.
What this tool checks
Image alt text
Whether meaningful images have descriptive alt attributes.
Color contrast
Text/background contrast that meets WCAG readability ratios.
Form labels
That inputs have associated labels screen readers can announce.
ARIA & roles
Correct use of ARIA attributes — and misuse that breaks assistive tech.
Heading structure
A logical heading order that lets users navigate by structure.
Why it matters
Accessibility isn't a nice-to-have. Roughly one in six people lives with a disability, and an inaccessible site simply turns them away — along with the search engines that reward well-structured, semantic pages.
Many accessibility fixes (alt text, labels, contrast, semantic headings) overlap directly with good SEO and clean code, so improving one improves the others.
How to read your results
- Add descriptive alt text to every meaningful image; mark purely decorative images as such.
- Fix low-contrast text — it's the most common and easiest-to-miss issue.
- Ensure every form field has a visible, associated label.
- Use real heading tags in order (H1 → H2 → H3) rather than styled text.
Frequently asked questions
What is WCAG?
The Web Content Accessibility Guidelines — the international standard for making web content usable by people with disabilities. WCAG 2.1 AA is the common target.
Can a tool catch every accessibility issue?
No. Automated tools catch many common, machine-detectable problems, but some criteria need human judgement and testing with real assistive technology.
Is accessibility legally required?
In many regions, yes — and lawsuits over inaccessible sites are rising. Beyond compliance, it's simply the right thing and expands your audience.
Does accessibility help SEO?
Yes. Alt text, semantic headings, descriptive links and clean structure help both screen readers and search engines understand your page.
The Complete Technical SEO Checklist for 2026 →
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Want the full picture?
Run a complete siteIQ audit — security, performance, SEO, accessibility and infrastructure — 65+ checks across 8 categories, in one report.