Your Free Guide to Website Accessibility Features

Understanding Website Accessibility and Why It Matters

Website accessibility means designing and building websites so that all people can use them, regardless of their abilities or disabilities. According to the World Health Organization, over 1 billion people worldwide experience some form of disability. This includes people who are blind or have low vision, deaf or hard of hearing, have mobility limitations, cognitive disabilities, or other conditions that affect how they interact with websites.

When websites are not accessible, they create barriers. A person who is blind cannot use a website that relies only on images without descriptions. Someone with a mobility disability may struggle with a site that requires precise mouse clicks. A person who is deaf cannot watch videos without captions. These barriers are not minor inconveniences—they can prevent people from accessing important information, making purchases, communicating with organizations, or participating in online communities.

The legal framework for accessibility varies by country. In the United States, the Americans with Disabilities Act (ADA) requires that websites operated by private businesses and government agencies be accessible. The European Union's Web Accessibility Directive requires public sector websites to follow accessibility standards. Canada, Australia, and many other countries have similar laws. Beyond legal requirements, accessibility is simply good design. It benefits not just people with disabilities, but everyone. For example, captions help people in noisy environments, voice controls help people with their hands full, and clear navigation helps people in a hurry.

Practical Takeaway: Accessible websites serve more people and often work better for everyone. If you build or manage a website, accessibility is not a feature to add later—it should be built in from the start.

The Web Content Accessibility Guidelines (WCAG) Explained

The Web Content Accessibility Guidelines, or WCAG, are the international standard for website accessibility. They were created by the World Wide Web Consortium (W3C), the organization that sets web standards. WCAG provides a clear framework that website creators and developers can use to make their sites accessible.

WCAG is organized around four core principles, often remembered by the acronym POUR. Perceivable means users must be able to see or hear the content—this includes adding text descriptions to images so screen readers can read them aloud, and providing captions for videos. Operable means users must be able to navigate the site using a keyboard, voice commands, or other tools—not just a mouse. Understandable means the language and navigation should be clear, the site should be predictable, and users should get help if they make mistakes. Robust means the website should work with assistive technologies like screen readers and voice recognition software.

WCAG comes in three levels: A, AA, and AAA. Level A is the most basic—if a website meets this, it handles fundamental accessibility needs. Level AA is the middle standard and is what most legal requirements call for. Level AAA is the highest standard. Many organizations aim for Level AA because it provides strong accessibility without requiring extreme effort on every feature.

The current version is WCAG 2.1, released in 2018, with updates addressing mobile accessibility and users with cognitive disabilities. WCAG 3.0 is in development and will introduce even clearer guidance. Most legal requirements currently reference WCAG 2.1 at Level AA as the standard to meet.

Practical Takeaway: If you are responsible for a website, learn whether WCAG 2.1 Level AA applies to you and use it as your target. These guidelines are detailed but learnable, and many tools exist to help you check your progress.

Key Accessibility Features You Should Know About

Websites that follow accessibility standards include several features that remove barriers for disabled users. Understanding these features helps you recognize accessible design and understand what to look for when evaluating a website.

Text Alternatives: Images, videos, and graphics should have text descriptions. For images, this is called "alt text." A screen reader user cannot see an image, but they can read the alt text. For example, if a website shows a photo of a sunset, good alt text might read "Orange and pink sunset over ocean water with silhouetted trees in foreground." Bad alt text might just say "sunset" or "image1." Videos should have captions (text of the spoken words) and ideally a transcript (the full text of everything said).

Keyboard Navigation: Many people cannot use a mouse due to arthritis, paralysis, or other conditions. They navigate using a keyboard, pressing Tab to move between links and buttons, and Enter to activate them. Accessible websites work completely with keyboard navigation. You should be able to tab through every button, link, and form field on the page in a logical order.

Color and Contrast: People with low vision or color blindness need sufficient contrast between text and background. The standard requires a ratio of at least 4.5:1 for normal text (that means the darker color is at least 4.5 times as bright as the lighter one). Websites should never communicate information using color alone—for instance, "Click the red button to submit" fails accessibility because a color-blind person cannot distinguish it. Instead, use "Click the red Submit button."

Screen Reader Compatibility: Screen readers are software programs that read web content aloud. They are used by people who are blind or have severe low vision. For screen readers to work properly, websites must be coded correctly with proper headings, lists, labels for form fields, and semantic HTML (code that describes what different parts of the page are).

Resizable Text: Users should be able to zoom in and enlarge text without the page breaking or becoming unusable. Many older adults increase text size to read more comfortably. Some people with low vision need magnification. A website that allows text to be enlarged up to 200% without horizontal scrolling is more accessible.

Forms That Work: Online forms should clearly label every field, show errors in multiple ways (not just color), and allow users to navigate with a keyboard. Instructions should be clear and easy to find.

Practical Takeaway: When using a website, look for these features: Can you tab through everything with a keyboard? Can you read captions on videos? Is text large enough and high-contrast enough to read? Can you magnify the page? These features signal an accessible site.

Free Tools and Resources for Checking Website Accessibility

You do not need to be a developer to check whether a website is accessible. Many free tools can scan a website and report problems. These tools are not perfect—they catch maybe 30 to 50 percent of accessibility issues—but they provide a good starting point.

Automated Testing Tools: WAVE (Web Accessibility Evaluation Tool) is a free tool from WebAIM that checks a website and highlights problems with colors, contrast, missing alt text, and other common issues. You can use it as a browser extension or visit the website and paste in a URL. Axe DevTools is another free browser extension that scans pages and explains issues in plain language. Lighthouse, built into Google Chrome, includes an accessibility audit. These tools give you a report showing what is broken and what you can do to fix it.

Screen Reader Testing: To truly understand how disabled users experience your site, you should test with actual screen readers. NVDA (NonVisual Desktop Access) is free software for Windows that reads web content aloud. JAWS is the most popular commercial screen reader but costs money. On Mac, VoiceOver is built in. Testing with a screen reader is more time-consuming than using automated tools, but it reveals problems that automated tools miss.

Color Contrast Checkers: If you are designing a website and worried about color contrast, use a free contrast checker like WebAIM's Contrast Checker or Color Contrast Analyzer. You enter a foreground color and background color, and it tells you whether the contrast is sufficient for different text sizes.

Browser Extensions for Users: People with disabilities can use free browser extensions to modify websites for their needs. High Contrast is a Chrome extension that increases contrast on web pages. Extensions like NaturalReader read text aloud. Some browsers have built-in reading modes that simplify pages and increase text size. These tools help disabled people use inaccessible websites, but websites should be accessible without requiring users to install special software.

Learning Resources: WebAIM offers free courses and articles on accessibility. The W3C WA