Web accessibility starts with the basics

Accessibility is not a layer to add after a website is finished. It starts with ordinary decisions: clear content, semantic HTML, keyboard support, readable contrast, and alternatives for media.

Those decisions help people with visual, auditory, physical, cognitive, and neurological disabilities. They also make a site easier to use in temporary or situational constraints—a broken mouse, bright sunlight, a small screen, or a noisy room.

The Web Content Accessibility Guidelines (WCAG) provide the standard framework, but a useful first pass can begin with a handful of concrete checks.

Make the content understandable

Write clear headings, keep sentences direct, and explain jargon when the audience may not know it. Headings should describe the sections that follow, not merely make text larger.

Links need the same care. “Read the accessibility report” makes sense when read on its own; “click here” does not. Screen-reader users often navigate through a list of links, where surrounding text may not be available.

Use HTML for what it already knows

Semantic HTML gives browsers and assistive technologies useful information without extra code. Use buttons for actions, links for navigation, headings in a logical order, and real lists and tables when the content has those structures.

Native elements also bring keyboard behaviour and accessibility semantics that a clickable <div> does not. ARIA can fill specific gaps, but it is not a replacement for choosing the correct element.

Text, colour, and media need alternatives

Informative images need alternative text that communicates their purpose in context. Decorative images should usually have empty alt text (alt="") so a screen reader can skip them. “Image” or a file name is rarely useful.

Videos need accurate captions for spoken words and meaningful sounds. Audio-only content may need a transcript. Do not rely on colour alone to communicate an error, status, or category, and check that text has enough contrast against its background.

Try the site without a mouse

Every interactive control should be reachable and usable with a keyboard. Focus must be visible, the order should follow the page, and opening a modal or menu should not leave focus somewhere behind it.

A quick keyboard pass catches many problems: use Tab and Shift+Tab to move, Enter or Space to activate controls where appropriate, and Escape to close temporary interfaces when that behaviour is expected.

Tools help, but they do not decide

Automated audits and contrast checkers are useful. They can find missing attributes, invalid relationships, and some colour failures quickly. They cannot tell whether alternative text is meaningful, whether the focus order makes sense, or whether instructions are understandable.

Combine automated checks with keyboard testing and at least a basic screen-reader pass. For important services, testing with disabled users provides insight no checklist can replace.

Accessibility is a large subject, but the first improvements are not exotic. Start with the browser’s native behaviour, keep the content clear, test the paths people actually use, and fix barriers as part of normal development rather than saving them for the end.