What Is Web Accessibility?
Web accessibility refers to the design and development of websites, tools, and technologies so that all people, regardless of disability, can perceive, understand, navigate, and interact with them.
The World Wide Web Consortium (W3C) defines web accessibility formally through its Web Content Accessibility Guidelines, known as WCAG. These guidelines are organised around four core principles: content must be perceivable, operable, understandable, and robust.
Disabilities addressed by web accessibility guidelines include visual impairments ranging from low vision to complete blindness, hearing impairments, physical or motor limitations that prevent mouse use, cognitive and learning disabilities, and situational limitations such as using a phone in bright sunlight or in a noisy environment.
Designing for accessibility therefore benefits a far broader audience than just the approximately 15 percent of the global population living with a disability.
In South Africa, where approximately 7.5 percent of the population is recorded as having some form of disability, and where a further percentage experience temporary or situational limitations, accessible design is both an ethical obligation and a commercial opportunity.
A business whose website works reliably with a screen reader, supports keyboard navigation, and maintains adequate colour contrast for low-vision users is reaching customers that competitors are not. It also builds trust signals that improve overall brand perception.
The technical building blocks of accessible design include semantic HTML elements that communicate their purpose to assistive technologies, ARIA roles and attributes for dynamic content, sufficient colour contrast ratios, visible keyboard focus indicators, descriptive link text, image alt text, captions for video content, and form labels that are programmatically associated with their inputs.
Each of these elements is testable, measurable, and achievable in standard web development practice.
Web Accessibility In Practice
The scenario below is an illustrative example, not a Juicy Designs client result. The figures indicate the scale of effect that web accessibility work typically produces, so treat them as indicative rather than measured.
Imagine a Johannesburg-based financial services company that, in a user research session, finds that a significant portion of its older customer base cannot complete the online claim form because the form fields have no visible labels and rely entirely on placeholder text, which disappears when the user begins typing.
Screen reader users would be unable to determine what each field requires. Fixing this would mean adding explicit label elements associated with each input via the for attribute.
A change of this kind would typically take less than two hours to implement, yet it could re-enable an entire segment of customers to transact independently online.
Common quick wins for South African businesses include adding descriptive alt text to all meaningful images, ensuring all interactive elements are keyboard focusable and show a visible focus ring, increasing button and link target sizes to at least 44x44 pixels for touch accessibility, and ensuring text maintains a contrast ratio of at least 4.5:1 against its background.
Tools such as the axe browser extension, Google Lighthouse, and the WAVE Web Accessibility Evaluation Tool provide free automated checks that identify the most common issues within minutes.
What web accessibility is
Web accessibility is the practice of designing and building websites so that they can be used by everyone, including people with disabilities, whether visual, auditory, motor or cognitive, who may rely on assistive technologies such as screen readers, keyboard navigation, or other adaptations. An accessible website works for people who cannot see and use a screen reader, people who cannot use a mouse and navigate by keyboard, people with low vision who need sufficient contrast and resizable text, people who are deaf or hard of hearing and need captions, and people with cognitive differences who benefit from clear structure and language. Accessibility is achieved through practices such as proper semantic HTML (so assistive technologies understand the page), alt text for images, sufficient colour contrast, keyboard operability, clear labels and structure, captions for media, and ARIA attributes where native HTML is insufficient, guided by standards, principally the Web Content Accessibility Guidelines (WCAG). Web accessibility matters ethically, because the web should be usable by all; practically, because accessible sites reach a wider audience and are generally better-built and more usable for everyone; and increasingly legally, as more jurisdictions require it. It is a core quality of a well-made website, ensuring the site genuinely works for the full range of people who might use it, not only those without disabilities or using standard setups.
Web accessibility, standards and SEO
Web accessibility is guided by the Web Content Accessibility Guidelines (WCAG), the widely-recognised standard that sets out criteria at levels (A, AA, AAA), with AA commonly taken as the practical target, covering principles that content be perceivable, operable, understandable and robust. Building to these guidelines, through semantic markup, alt text, contrast, keyboard access, labels, captions and appropriate ARIA, is how accessibility is achieved and assessed, and accessibility testing tools and audits help identify gaps. Notably, accessibility and SEO overlap considerably: many practices that make a site accessible also help search engines, because search crawlers, like assistive technologies, rely on well-structured, semantic, well-labelled content. Alt text helps both screen readers and image search; semantic HTML and clear structure help both assistive technology and crawlers understand the page; descriptive link text, logical headings and captions serve both audiences. So investing in accessibility tends to improve SEO as a by-product, and vice versa, since both reward clear, well-structured, well-described content. Legally, accessibility requirements are expanding across jurisdictions, and organisations increasingly treat WCAG conformance as a standard to meet. For a South African business, building accessibly widens the audience the site can serve, improves overall usability and build quality, aligns with SEO best practice, and reduces legal and reputational risk. The practical takeaway is that accessibility is not a niche add-on but a core dimension of good web development that benefits users of all abilities and, through its overlap with structured, semantic content, supports search visibility too.
FAQ
Does web accessibility help SEO?
Yes. Many accessibility practices directly support SEO. Alt text on images helps both screen readers and Google understand image content. Semantic HTML headings provide search engines with a clear content structure.
Keyboard navigability and logical content flow contribute to engagement metrics that Google uses as quality signals. Accessible sites tend to rank better as a natural by-product of good technical practice.
Is web accessibility legally required in South Africa?
The South African Constitution and the Promotion of Equality and Prevention of Unfair Discrimination Act (PEPUDA) prohibit discrimination on the basis of disability. While no specific web accessibility law yet exists equivalent to international standards, public sector entities and larger businesses increasingly face expectations to meet WCAG 2.1 AA standards to avoid discrimination claims and demonstrate inclusive practices.