Website Accessibility:
Building a Web Everyone Can Use
Over 1 billion people live with a disability. Accessibility isn't just the right thing to do — it's good for business, good for SEO, and increasingly required by law.
What Is Website Accessibility?
Website accessibility means designing and building your website so that people with disabilities can use it fully and independently. This includes people who are blind or have low vision, those who are deaf or hard of hearing, people with motor impairments who navigate with keyboards or switch devices instead of mice, and people with cognitive disabilities who benefit from clear, consistent layouts.
The international standard for web accessibility is WCAG — the Web Content Accessibility Guidelines — published by the W3C (the organization that sets web standards). WCAG 2.1 is the current benchmark and defines hundreds of specific criteria organized around four principles: content must be Perceivable, Operable, Understandable, and Robust. Most businesses target WCAG 2.1 Level AA, which is what regulators and courts typically refer to when evaluating compliance.
Why Accessibility Matters
Approximately 1 in 4 adults in the United States has some form of disability. Many of these disabilities directly affect how people use the web. When your website is inaccessible, you're turning away a significant portion of your potential customers — not because they don't want your product, but because they literally cannot use your website. The global market of people with disabilities has an estimated spending power of over $13 trillion.
Legal risk is also real and growing. The Americans with Disabilities Act (ADA) has been applied to websites in hundreds of court cases, with businesses of all sizes facing lawsuits and regulatory action for inaccessible digital experiences. The EU Web Accessibility Directive and the European Accessibility Act extend similar obligations across Europe.
Accessibility and SEO are deeply intertwined. Many accessibility best practices — semantic HTML, descriptive alt text, clear heading structure, keyboard navigation — are also SEO best practices. Search engines index your content the same way screen readers interpret it: without visual context, relying entirely on the underlying markup. An accessible site is almost always better optimized for search.
What SeekON.ai Checks
Every audit evaluates these 8 accessibility signals that have the greatest impact on usability and compliance.
ARIA Attributes
ARIA (Accessible Rich Internet Applications) attributes allow developers to add semantic meaning to HTML elements that assistive technologies would otherwise not understand. For example, a custom dropdown menu built with divs has no inherent meaning to a screen reader — ARIA roles and states tell the screen reader "this is a menu" and "this option is currently selected." SeekON checks for common ARIA implementation errors, which can make interfaces more confusing for disabled users rather than more helpful.
Color Contrast
Color contrast refers to the ratio of brightness between your text and its background. WCAG 2.1 AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. Low contrast — like light gray text on a white background — is one of the most common accessibility failures and affects anyone who isn't viewing your site in ideal lighting conditions, including millions of people with age-related vision decline. SeekON flags text elements that fall below the required contrast threshold.
Keyboard Navigation
Many users cannot use a mouse — people with motor impairments may navigate entirely by keyboard, using Tab to move between interactive elements and Enter or Space to activate them. SeekON checks whether all interactive elements on your page — links, buttons, form fields, menus — are reachable and operable via keyboard alone. Missing keyboard support often happens in custom JavaScript components that implement visual interactions without proper keyboard equivalents.
Screen Reader Support
Screen readers are software applications that read aloud the content and structure of a webpage for users who are blind or have severe low vision. They rely on proper semantic HTML — headings, lists, landmarks, button text — to give users a coherent picture of the page. SeekON checks for common screen reader failures: buttons without text, images without alt text, links that say only "click here," and form fields without associated labels.
Form Labels
Every form input — text fields, checkboxes, radio buttons, dropdowns — must have a programmatically associated label that screen readers can announce. Using placeholder text alone (the grayed-out hint that disappears when you type) is not sufficient; it disappears as soon as a user starts typing and isn't reliably announced by all assistive technologies. SeekON checks that all form inputs have proper <label> elements or ARIA labelledby attributes correctly wired up.
Focus Indicators
When keyboard users navigate through a page, there must be a clearly visible indicator showing which element currently has focus — typically a highlighted border or outline around the active element. Many designers disable the default browser focus outline because it looks visually inconsistent without replacing it with a custom indicator. SeekON checks whether interactive elements have visible focus styles, since removing them makes keyboard navigation essentially impossible for low-vision users.
Alternative Text
Alternative text (alt text) on images serves two purposes: it provides a text description for users who can't see the image, and it's read aloud by screen readers. Alt text should be descriptive and meaningful — "Bar chart showing 40% increase in sales in Q3 2024" rather than "chart.png". Decorative images that convey no information should use empty alt text (alt="") so screen readers skip them. SeekON audits all images and flags those with missing, generic, or filename-based alt text.
WCAG 2.1 Compliance
WCAG 2.1 is organized into three conformance levels: A (minimum), AA (standard target), and AAA (enhanced). SeekON evaluates your site against the most impactful WCAG 2.1 Level A and AA criteria, providing an overall compliance score and identifying which specific guidelines you're failing. This gives you a prioritized list of fixes that will have the greatest impact on accessibility and reduce your legal exposure.
How to Improve Your Accessibility Score
Frequently Asked Questions
Is my website required by law to be accessible?
It depends on your location and business type. In the United States, businesses open to the public may be subject to ADA Title III requirements, which courts have increasingly applied to websites. The EU Web Accessibility Directive applies to public sector bodies, and the European Accessibility Act applies more broadly. Regardless of legal requirements, accessibility is an increasing expectation from customers and regulators worldwide.
What's the difference between WCAG 2.0, 2.1, and 2.2?
WCAG 2.0 is the original version from 2008. WCAG 2.1 (2018) added 17 new criteria, particularly for mobile accessibility and cognitive disabilities. WCAG 2.2 (2023) added further criteria around focus appearance and authentication. WCAG 2.1 AA is the current standard target for most businesses, and each version is backward compatible — meeting 2.2 means you also meet 2.0 and 2.1.
Can automated tools catch all accessibility issues?
Automated tools like SeekON can reliably catch about 30-40% of WCAG failures — things like missing alt text, insufficient color contrast, and absent form labels. The remaining issues require human testing, including keyboard navigation testing and screen reader testing, to identify. The Pro Audit includes a deeper analysis to help prioritize issues that automated scanning alone might miss.
Does adding accessibility features slow down my website?
No. ARIA attributes, semantic HTML, and descriptive alt text add negligible file size. Proper focus indicators are pure CSS. Most accessibility improvements have zero performance impact. In fact, semantic HTML and clean markup often result in smaller file sizes and faster parsing compared to div-heavy, non-semantic alternatives.
My website uses a page builder. How do I improve accessibility?
Page builders vary significantly in their accessibility support. Elementor, WordPress with the Block Editor, and Webflow have reasonable accessibility foundations. Check your page builder's documentation for accessibility settings. The most critical areas to address: ensure all images have alt text fields that are filled in, that form fields use proper labels, and that your color choices pass contrast requirements.
How Accessible Is Your Website?
Run a free audit to see your accessibility score and the specific issues affecting your users.