What Is Web Accessibility? Explained

What web accessibility is

Web accessibility means designing and building websites so that everyone can use them, including people with disabilities. A truly accessible site can be perceived and navigated by people who are blind or have low vision, who are deaf or hard of hearing, who have motor impairments, or who have other conditions that affect how they use the web. Accessibility ensures the web is open to all, rather than only to people without disabilities, which is both a practical goal and a matter of fairness.

Who it helps

Accessibility helps a wide range of people. Someone who is blind may use a 'screen reader' that reads page content aloud, and needs the site to be built so that software can make sense of it. Someone who cannot use a mouse may navigate entirely by keyboard. People with low vision benefit from good contrast and resizable text; people who are deaf benefit from captions on videos. Accessibility is about making sure the web works for this full diversity of users.

Key practices

Many accessibility practices are well established. Providing text descriptions ('alt text') for images lets screen readers convey what an image shows. Ensuring a site can be fully used with a keyboard helps those who cannot use a mouse. Using sufficient color contrast makes text readable for people with low vision. Adding captions to videos helps deaf and hard-of-hearing users. Structuring content clearly with proper headings helps assistive technology navigate. These practices, among others, make a site genuinely usable by more people.

It benefits everyone

A key insight is that accessibility helps everyone, not just people with disabilities. Captions help anyone watching video in a noisy place or without sound. Good contrast helps in bright sunlight. Clear structure and keyboard navigation benefit power users. Designing for accessibility tends to produce sites that are clearer, more usable, and better organized for all visitors. Far from being a niche concern, accessibility improves the overall quality of a website.

A shared responsibility

Accessibility is also increasingly expected and, in many places, legally required, especially for public services and businesses. There are widely recognized guidelines that describe how to make web content accessible. Building accessibility in from the start is far easier than retrofitting it later. It is best understood not as an optional extra but as a fundamental part of doing web design well, a responsibility shared by everyone who builds for the web.

Why it matters

Web accessibility is essential to an inclusive internet, ensuring that people of all abilities can access information and services online. Understanding it clarifies the barriers some people face on the web and the practical steps that remove them, steps that also make sites better for everyone. For anyone who builds websites, accessibility is a core skill and responsibility; for everyone, it is a reminder that good design considers all users.

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See also: What is HTML? Explained simply, What is UX vs UI design? Explained.

Sources

• Web accessibility - Wikipedia

Published date reflects the original event date (2024-03-05). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.