Website Accessibility for Disabled Users: Removing Common Digital Barriers

Website Accessibility for Disabled Users means making web content usable by people with a wide range of impairments. This article lists the common digital barriers, explains relevant standards such as WCAG and WAI-ARIA, and gives a step by step approach to prioritise and fix accessibility problems on pages and components.

Common digital barriers disabled users encounter

Missing or poor alternative text for images

If an image lacks an alt attribute or the text is unhelpful, screen reader users lose essential content. Decorative images should use empty alt text. Informative images need concise, descriptive alt text that matches the image purpose.

Poor heading structure and missing landmarks

People who use screen readers rely on headings and ARIA landmarks to scan a page. Using visual styles only, or skipping heading levels, makes navigation slow and confusing.

Keyboard inaccessibility

Many users cannot use a mouse. If links, controls, or menus are not reachable or operable with keyboard focus and standard keys, those users cannot use the site.

Forms without labels or clear error messages

Inputs must have explicit <label> elements or aria-label attributes. Error messages need to be programmatically associated with fields and explain how to fix the problem.

Low contrast and colour-reliant cues

Text and interactive elements that do not meet contrast requirements are hard to read for people with low vision. Relying on colour alone to convey information excludes colour-blind users.

Uncaptioned video and missing transcripts

Videos without captions or transcripts exclude deaf and hard of hearing users. Audio-only content needs a text alternative or transcript.

Time limits, flashing content and inaccessible authentication

Short timeouts can lock out users who need more time. Content that flashes above safe thresholds risks triggering seizures. CAPTCHAs that require visual puzzles or audio that lacks alternatives are a barrier.

Standards and legal context to know

WCAG is the technical baseline used worldwide. Use WCAG 2.1 or 2.2 success criteria as the reference. The levels are A, AA, and AAA. Most organisations aim for AA to cover major barriers.

WAI-ARIA provides roles, states and properties to expose custom widgets to accessibility APIs. Use ARIA only when native HTML cannot provide the needed semantics.

In the UK, the Equality Act 2010 requires reasonable adjustments for disabled people when providing services. Other jurisdictions use laws such as the US Rehabilitation Act Section 508 or national equivalents. Check legal obligations for your market.

How to test accessibility

Automated tools find common failures but miss many issues. Combine automated checks with manual testing and user testing.

Automated scanning

Run a page through a rules-based tool to catch missing alt text, ARIA misuse, heading problems and contrast failures. Use the automated tool results as the start of a checklist, not the final verdict.

Keyboard-only testing

Turn off the mouse and navigate using Tab, Shift+Tab, Enter, Space and arrow keys. Check focus order, visible focus indicators, skip links, and whether custom widgets announce state changes.

Screen reader testing

Test with at least one free and one built-in screen reader. For example, NVDA or VoiceOver. Listen to how pages are announced, and verify images, headings and form labels are exposed correctly.

Colour contrast checks

Measure contrast ratios against WCAG thresholds for normal and large text. Fix combinations that fall below level AA criteria.

User testing with people with disabilities

Invite a small number of users with diverse needs. Observe real tasks such as finding information, completing a form, and playing media. Their feedback reveals gaps tools cannot detect.

Step-by-step: Fix one page fast (high impact, low effort)

Use this sequence when you need visible improvements on a live page.

1. Run an automated scan and export issues.
2. Fix missing alt text for all informative images.
3. Ensure all form controls have labels and descriptive placeholder text is not used as a label.
4. Check keyboard navigation and add focus styles if none appear.
5. Measure colour contrast and increase contrast where needed.
6. Add captions or a transcript for any short videos on the page.
7. Re-run the automated scan and perform a short screen reader walk-through.

Decision framework for prioritising fixes

Prioritise by number of users affected, legal risk, and implementation effort. Use this simple matrix to choose what to fix first.

Priority	Typical fixes
Critical	Missing alt for meaningful images; inaccessible forms; keyboard traps; major navigation failures
High	Poor contrast; missing captions on essential videos; incorrect ARIA on widgets
Medium	Minor layout issues for zooming; non-essential animations; labeling improvements
Low	Cosmetic adjustments; AAA-level enhancements

Accessibility changes to build into design and development

• Use semantic HTML before adding ARIA roles
• Create accessible component library with tested patterns
• Include accessibility acceptance criteria in tickets
• Run automated checks in CI for every build
• Provide training for designers, writers and developers on accessible patterns

Quick checklist for content teams

• Write meaningful alt text for images that convey information
• Use clear heading order and concise headings
• Avoid relying on colour alone to indicate status
• Provide captions and transcripts for audio and video
• Keep link text descriptive and unique
• Label form fields and give actionable error messages

Next steps and maintenance

Publish an accessibility statement that explains your standard, known issues and contact details for feedback. Schedule periodic audits and include people with disabilities in testing cycles. Accessibility is ongoing work, not a one-off checklist.

Use the checks and the decision framework above to make steady progress. Prioritise fixes that restore essential access first, then refine visual and interaction details.