As someone who has spent countless hours creating websites, designing interactive applications, and enhancing user experiences, I can’t stress enough the importance of web accessibility. Web accessibility represents an absolute necessity in our digital age, not merely a consideration.

In this guide, I want to bring the key terms, practices, and concepts about web accessibility closer to you. When you finish reading this, I hope to instill in you not only the understanding but also the empathy required to design for everyone.

1. Accessible Rich Internet Applications (ARIA)

ARIA, short for Accessible Rich Internet Applications, offers a lifeline to make dynamic content and advanced user interface controls accessible. Think of it this way – when you build interactive elements like dropdown menus, sliders, or custom buttons, screen readers often can’t figure out what they’re supposed to do.

That’s where ARIA comes in. Add ARIA attributes to your HTML to make certain elements more descriptive, helping assistive technology better understand the purpose of each element. For instance, use aria-label to help label buttons that don’t contain text, thereby aiding screen reader users.

Let’s say you have a search button that only shows a magnifying glass icon. Without aria-label=”Search”, a screen reader user has no idea what that button does. But with aria-label=”Search”, suddenly it makes perfect sense.

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2. Alt Text

Alt text provides a concise description of images for those who can’t see them. This isn’t just about being nice – it’s about making your content accessible to everyone.

For example, for a company logo, alt text could be alt=”Company X’s logo”. For a graph showing quarterly sales data, you might write alt=”Bar chart showing 25% increase in sales from Q1 to Q4 2024″. This helps visually impaired users understand the content of your site.

But here’s something many people don’t know – decorative images shouldn’t have alt text at all. If an image is purely decorative and doesn’t add any meaningful information, leave the alt attribute empty (alt=””) so screen readers will skip it entirely.

3. Assistive Technology

Assistive technology refers to a range of devices that aid users with disabilities. This includes software like screen readers that read web content aloud, or hardware like specialized keyboards or switches that help people with motor disabilities navigate websites.

As a web designer, understanding how these technologies interact with your site becomes crucial. Screen readers like JAWS, NVDA, or VoiceOver don’t just read text – they interpret the structure of your HTML. If your code is messy or poorly structured, these tools can’t make sense of your content.

Voice recognition software like Dragon NaturallySpeaking allows people to navigate and interact with websites using voice commands. But if your site isn’t keyboard accessible, voice commands won’t work either since they rely on the same navigation paths.

4. Captions

For video content, captions prove vital. They are the text version of the audio, helping those who are deaf or hard of hearing understand what’s being said. Users in noisy or sound-sensitive environments also benefit from them.

But captions do more than just transcribe dialogue. Good captions also include sound effects, music cues, and speaker identification. They describe important audio information that contributes to understanding the content.

Think about it – when you’re watching a video in a crowded coffee shop or late at night when you can’t turn up the volume, captions aren’t just helpful, they’re essential. The same goes for users who are deaf or hard of hearing, except they need captions all the time, not just in specific situations.

5. Color Contrast

Color contrast between text and its background remains critical for readability. This affects not just people who are blind, but also those with low vision, color blindness, or anyone using their device in bright sunlight.

WCAG Color Contrast Requirements

Text SizeMinimum Contrast Ratio
Normal text (under 18pt)4.5:1
Large text (18pt+ or 14pt+ bold)3:1
Graphics and UI components3:1

Use the WebAIM Color Contrast Checker to test your color combinations.

Quick Examples:

❌ Fails: Light gray (#999999) on white (#FFFFFF) = 2.85:1 ratio
✅ Passes: Dark gray (#666666) on white (#FFFFFF) = 5.74:1 ratio

Think about it practically – if you can’t read your text comfortably on your phone in bright sunlight, users with low vision definitely can’t read it indoors either.

Color Contrast Checker

Test your color combinations for WCAG compliance

Text Color
Background Color
This is how your text will look with these colors
21:1 Contrast Ratio
✓ PASS
AA Normal
✓ PASS
AA Large
✓ PASS
AAA Normal
✓ PASS
AAA Large

Quick Test Examples

Links should be self-explanatory, describing the anchor text and what the user can expect if they click on them. Instead of writing “Click here” or “More”, use a phrase like “Learn more about web accessibility”.

Why does this matter? Screen reader users often navigate by jumping from link to link, hearing only the link text out of context. If every link on your page says “click here” or “read more”, that’s not very helpful, is it?

Good link text also helps with SEO since search engines use link text to understand what the linked page is about. It’s a win-win situation.

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7. Focus Indication

When users navigate with a keyboard, a focus indicator shows where the keyboard focus currently lies. This is usually a visible outline or highlight around the currently selected element.

Make this clearly visible and follow a logical order. Many designers remove focus indicators because they think they look ugly, but for keyboard users, removing focus indication is like turning off the lights and asking someone to navigate your site blindfolded.

The focus order should follow a logical sequence – typically left to right, top to bottom. Users should be able to reach all interactive elements and never get trapped in one section of the page.

8. Forms and Input Fields

These need to be clearly labeled and provide error messages to guide users. Include a description of what is expected in an input field and use error identification such as aria-describedby to associate error messages with form controls. This greatly enhances usability.

Every form field needs a proper label that’s programmatically associated with the input. Use the <label> element and connect it to the input using the “for” attribute. When someone clicks on the label, it should focus the corresponding input field.

Error messages should be specific and helpful. Instead of “Error in field”, tell users exactly what went wrong: “Password must be at least 8 characters long and include one number”. And make sure error messages are announced by screen readers using aria-describedby or aria-live regions.

9. Headers

Headers not only organize your content for all users but also provide an overview of the page to screen reader users. Make sure to use them sequentially (H1-H6), and avoid skipping levels.

Think of headers like an outline for your content. Your page should have one H1 (the main heading), then use H2 for major sections, H3 for subsections under those H2s, and so on. Don’t jump from H1 directly to H3 – that’s like having a chapter 1 followed immediately by section 1.3.1.

Screen reader users can navigate through headings to quickly understand the structure of your page and jump to the section they need. If your headings don’t follow a logical hierarchy, this navigation becomes confusing and unhelpful.

10. Keyboard Navigation

One of the key aspects of web accessibility involves making sure that every feature of your website can be accessed using only a keyboard. Some users may have physical disabilities that make using a mouse difficult, while others may rely on assistive technologies like screen readers that depend on keyboard use.

Essential Keyboard Commands

KeyFunction
TabMove forward through interactive elements
Shift + TabMove backward through interactive elements
EnterActivate links and buttons
SpaceActivate buttons, checkboxes, and controls
Arrow KeysNavigate within dropdown menus, sliders, tabs
EscapeClose modals, dropdown menus, or cancel actions

Test your website regularly with these commands. Can you complete every task on your site – filling out forms, making purchases, accessing all content – using only keyboard navigation? If not, you’ve found accessibility barriers that need fixing.

11. Transcripts

Just like captions are vital for videos, transcripts are essential for audio content. They help deaf or hard of hearing users follow along, and can also aid in comprehension for users who may struggle with the language in the audio content. Whenever possible, include a complete transcript of any audio content on your site.

Transcripts go beyond just captions. While captions are synchronized with video, transcripts provide the full text in a readable format that users can browse, search, and reference at their own pace.

For podcasts, webinars, or audio instructions, transcripts make the content accessible to everyone and also improve your SEO since search engines can index the text content.

12. WCAG and ADA

WCAG stands for the Web Content Accessibility Guidelines, a set of guidelines designed to make web content more accessible to individuals with disabilities. The current version is WCAG 2.2, which includes 9 additional success criteria beyond WCAG 2.1, focusing on mobile accessibility and cognitive disabilities.

WCAG Conformance Levels

LevelRequirementsBest For
AMinimum levelBasic compliance
AAStandard levelMost websites and legal requirements
AAAHighest levelSpecialized applications (often not practical for entire sites)

The POUR Principles

WCAG is organized around four main principles:

  • Perceivable – Information must be presentable in ways users can perceive
  • Operable – Interface components must be operable by all users
  • Understandable – Information and UI operation must be understandable
  • Robust – Content must work with various assistive technologies

The ADA or Americans with Disabilities Act, is a U.S. law that requires certain businesses and organizations to provide accessible websites. Recent updates require state and local governments to meet WCAG 2.1 Level AA standards. Not adhering to ADA can lead to legal implications, so keeping current with WCAG updates helps your website stay both accessible and legally compliant.

WCAG 2.2 Compliance Levels

Understanding the three levels of web accessibility standards

Level A

Minimum Compliance

The basic level of accessibility that addresses the most severe barriers to web access.

30 Success Criteria
Basic Compliance Legal Minimum Foundation Level
Level AA

Standard Compliance

The recommended level for most websites and the standard required by most accessibility laws.

50 Success Criteria
Most Websites ADA Standard Government Sites E-commerce
✓ RECOMMENDED

This is the sweet spot for most organizations – comprehensive accessibility without being overly restrictive on design.

Level AAA

Enhanced Compliance

The highest level of accessibility, typically used for specialized applications or specific content areas.

78 Success Criteria
Healthcare Apps Educational Tools Specialized Content

13. Mobile Accessibility

Mobile accessibility deserves special attention since most web traffic now comes from mobile devices. Touch targets should be at least 44 pixels in size to accommodate users with motor impairments who might have difficulty tapping small buttons accurately.

Screen reader support varies between iOS VoiceOver and Android TalkBack, so test with both if possible. Consider how users navigate with swipe gestures and voice commands. Mobile users with cognitive disabilities benefit from simplified layouts and clear, single-column designs that reduce cognitive load.

Mobile devices also present unique challenges – users might be operating them with one hand, in bright sunlight, or while distracted. Design patterns that work well in these situations often benefit everyone.

14. Cognitive Accessibility

Cognitive disabilities affect how people process information, remember details, and make decisions. According to the CDC, 12.8% of adults in the U.S. have some type of cognitive disability.

Common Cognitive Disabilities Include:

  • Dyslexia – Difficulty reading and processing written language
  • ADHD – Challenges with attention and focus
  • Autism – Different ways of processing sensory and social information
  • Memory impairments – Difficulty retaining or recalling information
  • Learning disabilities – Challenges processing specific types of information

Design Guidelines for Cognitive Accessibility

Creating cognitively accessible websites requires intentional design choices that reduce mental effort and confusion. These guidelines help you build interfaces that work for people with varying cognitive abilities, attention spans, and processing speeds.

Keep language simple and clear

  • Use everyday words instead of jargon
  • Write in short, simple sentences
  • Define technical terms when you must use them

Maintain consistent navigation

  • Keep menus in the same place on every page
  • Use predictable interactions throughout your site
  • Avoid sudden changes in layout or functionality

Provide clear feedback and instructions

  • Tell users what to expect before they take action
  • Give specific error messages that explain how to fix problems
  • Use progress indicators for multi-step processes

Avoid overwhelming content

  • Break up long blocks of text with headings and white space
  • Don’t auto-play videos or audio – they can be disruptive
  • Limit the number of choices presented at once

Remember – what helps users with cognitive disabilities often makes your site easier for everyone to use. We all have moments when we’re tired, stressed, or distracted.

15. Modern Testing Tools

Automated testing tools can catch about 30% of accessibility issues, but manual testing remains vital. Here’s your testing toolkit:

Automated Testing Tools

ToolWhat It DoesBest For
WAVEIdentifies accessibility errors visually on your pageQuick overview of issues
aXe DevToolsBrowser extension for detailed accessibility analysisDeveloper workflow
LighthouseBuilt into Chrome DevToolsOverall site performance including accessibility
Color Contrast AnalyzersCheck if text meets contrast requirementsDesign phase

Website Accessibility Testing Checklist

Follow this comprehensive testing flow to ensure your site is accessible

Complete all sections to ensure comprehensive accessibility testing
1
Automated Testing (0/4)
Run WAVE accessibility evaluation on all key pages
Check Lighthouse accessibility score (aim for 90+)
Use axe DevTools browser extension for detailed analysis
Test color contrast ratios for all text elements
2
Keyboard Navigation (0/5)
Navigate entire site using only Tab, Shift+Tab, Enter, and Arrow keys
Verify all interactive elements have visible focus indicators
Test modals and dropdowns for proper focus management
Confirm skip links work and are accessible
Test all functionality works without mouse interaction
3
Content & Structure (0/6)
Check heading hierarchy (H1-H6) follows logical order
Verify all meaningful images have descriptive alt text
Test form labels, error messages, and required field indicators
Ensure all links have descriptive text (avoid “click here”)
Verify each page has unique, descriptive title
Check page language is properly declared in HTML
4
Screen Reader Testing (0/4)
Test with NVDA screen reader (free download)
Test with VoiceOver on Mac/iOS devices
Verify content reading order makes logical sense
Check ARIA labels and landmarks are announced correctly
0 Completed
19 Total Tests
0% Progress

Start testing to track your accessibility compliance progress

For comprehensive evaluation, combine automated scanning with keyboard navigation testing and screen reader verification. But here’s the most important part – user testing with people who have disabilities provides the most valuable feedback. After all, they’re the ones actually using these technologies every day.

Remember, automated tools are great for catching obvious problems like missing alt text or insufficient color contrast. But they can’t tell you if your content actually makes sense to someone using a screen reader, or if your navigation is intuitive for someone with a cognitive disability.

Practical Tips for Better Web Accessibility

Web accessibility isn’t a one-time project, but an ongoing effort. Here are actionable tips that you can implement right now to improve the accessibility of your website:

These aren’t just theoretical recommendations – they’re practical steps you can start implementing today. Each improvement you make creates a better experience for someone who needs it, and many of these changes will improve your site for everyone.

Include alt text for all meaningful images. This practice benefits both accessibility and SEO performance. But remember – decorative images should have empty alt attributes (alt=””) so screen readers skip them.

Check color contrast. Make sure that your text is easily readable against its background using tools like the WebAIM Color Contrast Checker. This helps users with low vision, color blindness, and anyone using devices in challenging lighting conditions.

Make your website keyboard navigable. Regularly test your site to verify that all features can be accessed via keyboard. Start at the top of your page and tab through every interactive element – can you reach everything? Can you complete all tasks?

Use clear, descriptive links. Instead of “click here”, use “read more about our accessibility guidelines”. Screen reader users often navigate by jumping from link to link, so make sure each link makes sense out of context.

Provide transcripts for audio content. Include transcripts to help users who can’t hear your audio content can still access the information. This includes podcasts, video narration, and any audio instructions or announcements.

Test with automated tools. Use free tools like WAVE or browser extensions to identify common accessibility issues quickly. These tools are great starting points, but they’re not the complete solution.

Test with real users. Nothing beats feedback from people who actually use assistive technologies daily. Their insights will reveal problems that no automated tool can catch.

Stay current with WCAG. Keep up-to-date with the latest WCAG 2.2 guidelines to help your website remain accessible and legally compliant as standards continue to evolve.

The goal here isn’t perfection overnight – it’s progress. Every improvement you make creates a better experience for someone who needs it. As a web designer, you have the power to create experiences that everyone can enjoy, regardless of their abilities.

Frequently Asked Questions About Web Accessibility

Get answers to the most common questions about making your website accessible to everyone

What is web accessibility and why does it matter?

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Web accessibility is the practice of designing websites so everyone, including people with disabilities, can use them effectively. It matters because 1 billion people worldwide have disabilities, and inaccessible websites exclude them from digital services, information, and opportunities. Plus, accessible websites often work better for everyone and can help you avoid legal issues.

Is my website legally required to be accessible?

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In the US, the ADA requires many businesses to provide accessible websites, especially if they have physical locations or serve the public. Government websites must meet WCAG 2.1 AA standards. Globally, laws like the EU’s European Accessibility Act (effective June 2025) require accessibility for e-commerce, banking, and travel sites. Even without legal requirements, accessibility is good business practice.

What’s the difference between WCAG 2.1 and WCAG 2.2?

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WCAG 2.2 adds 9 new success criteria to WCAG 2.1, focusing on mobile accessibility, cognitive disabilities, and low vision support. Key additions include better focus indicators, larger touch targets (24×24 pixels minimum), and improved support for users who need more time to interact with content. WCAG 2.2 is backward compatible, so meeting 2.2 also meets 2.1 requirements.

Should I aim for WCAG Level A, AA, or AAA compliance?

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Most websites should target WCAG Level AA compliance. Level A covers only the most basic accessibility needs, while Level AAA is often impractical for entire websites. Level AA provides comprehensive accessibility that meets legal requirements in most jurisdictions and serves the vast majority of users with disabilities effectively.

Can I just add an accessibility widget or overlay to my site?

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Accessibility overlays and widgets cannot make your website fully accessible and may actually create new barriers for users with disabilities. These tools can interfere with assistive technologies that users already rely on. True accessibility requires building it into your website’s code and design from the ground up, not adding it as an afterthought.

How do I test if my website is accessible?

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Use a combination of automated tools (like WAVE, axe DevTools, or Lighthouse) and manual testing. Test keyboard navigation by using only Tab, Enter, and arrow keys. Try a screen reader like NVDA (free) or VoiceOver (Mac). Check color contrast and verify all images have alt text. Most importantly, consider getting feedback from actual users with disabilities.

What’s the most common accessibility mistake websites make?

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Missing or poor alt text for images is the most widespread issue, affecting over 55% of websites. Other common problems include insufficient color contrast (79% of sites), missing form labels, poor keyboard navigation, and unclear link text like “click here.” These issues are relatively easy to fix but have major impacts on accessibility.

How much does it cost to make my website accessible?

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Costs vary widely based on your site’s complexity and current accessibility level. Building accessibility in from the start adds roughly 5-10% to development costs. Retrofitting an existing site can cost $3,000-$25,000+ depending on size and issues found. However, the cost of lawsuits (average $50,000+ in legal fees) and lost customers often far exceeds accessibility investment.

Do I need to add captions to all my videos?

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Yes, all videos with audio content should have captions for users who are deaf or hard of hearing. This includes dialogue, sound effects, and music descriptions. Auto-generated captions are a start but should be reviewed for accuracy. Videos also benefit from transcripts that users can search and reference. Remember, captions help everyone in noisy environments or when sound isn’t available.

What should I focus on first when improving accessibility?

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Start with the fundamentals: ensure all images have descriptive alt text, check that your site works with keyboard-only navigation, verify color contrast meets WCAG standards, and make sure all form fields have proper labels. These changes impact the most users and are relatively straightforward to implement. Then move on to more complex issues like ARIA labels and screen reader testing.

How does mobile accessibility differ from desktop?

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Mobile accessibility requires larger touch targets (minimum 44×44 pixels), consideration for one-handed use, and compatibility with mobile screen readers like VoiceOver and TalkBack. Users may have reduced fine motor control on small screens, and context switching between apps is more difficult. Design for thumb navigation and ensure interactive elements aren’t too close together.

Will making my site accessible hurt SEO or performance?

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Accessible websites typically perform better in search engines and load faster. Alt text helps with image SEO, proper heading structure improves content understanding, and clean, semantic code performs better. Studies show accessible sites can see up to 37% more organic traffic. Good accessibility practices align closely with SEO best practices and performance optimization.