What Are Accessibility Features? Examples of Features That Improve Digital Access

What Are Accessibility Features — a clear definition

What are accessibility features? They are design and technical elements that let people with different abilities use digital content. Features include captions, keyboard access, semantic HTML, ARIA roles, adjustable text size and high contrast. Good features follow WCAG guidance and improve access for people with vision, hearing, motor or cognitive differences.

Why accessibility features matter

Accessibility features reduce barriers. They increase reach, lower support requests and meet legal duties such as the UK Equality Act for public services and employers. Most importantly, they let more people complete tasks like reading, buying or applying online.

How accessibility features are grouped (POUR)

Accessibility work often maps to four goals from WCAG: perceivable, operable, understandable and robust. Grouping features by these goals helps choose the right fixes.

Perceivable

• Text alternatives for non-text content (alt text)
• Captions and transcripts for audio and video
• Audio descriptions for important visual information
• Resizable text and responsive layouts

Operable

• Keyboard navigation for all interactive controls
• Visible focus indicators
• Logical tab order and skip links
• Timeout controls and adjustable interaction timing

Understandable

• Clear headings and labels
• Consistent navigation and predictable behaviour
• Helpful error messages and suggestions for form fields

Robust

• Semantic HTML and correct use of headings and lists
• Proper use of WAI-ARIA roles only when native elements are not sufficient
• Accessible PDFs and properly tagged documents

Examples of accessibility features by user need

Below are common features and why they help specific users.

For people with low or no vision

• Alt text for images so screen readers speak the content
• Semantic headings and landmarks so screen reader users can scan pages
• High contrast themes and user-controlled colour contrast
• Keyboard focus order and visible focus outlines

For people who are deaf or hard of hearing

• Closed captions and subtitles for videos
• Transcripts for audio content and podcasts
• Visual alerts as alternatives to sound notifications

For people with motor or dexterity differences

• Full keyboard support and access keys
• Large clickable targets and sufficient spacing
• Adjustable timing and alternatives to drag gestures

For people with cognitive or learning differences

• Plain language headings and short paragraphs
• Consistent layout and clear labels on form fields
• Read-aloud options and text highlighting as it is spoken

For people with photosensitive epilepsy

• Controls to stop or pause flashing content
• Avoidance of rapid flicker that can trigger seizures

Platform-specific accessibility features

Different platforms need different techniques. These are the common areas to check.

Websites

• Semantic HTML, headings and ARIA where needed
• Accessible forms with labels, instructions and clear error handling
• Contrast, responsive design and mobile accessibility

Video and audio

• Captions, transcripts and audio description tracks
• Player controls that work from keyboard and screen readers

PDFs and documents

• Tagged PDFs with a correct reading order and alt text for images
• Use accessible templates rather than scanned images when possible

Mobile apps

• Accessible native components (iOS VoiceOver and Android TalkBack)
• Support for dynamic text and system contrast modes

Common mistakes to avoid (practical examples)

Many sites try to be accessible but fail in specific ways. Watch for these real problems.

• Using ARIA to fix broken HTML instead of using correct semantic elements
• Providing captions that are automated and inaccurate without editing
• Hiding focus outlines with CSS, which breaks keyboard users
• Missing alt text on images that contain crucial information like charts
• Relying only on automated tests and skipping manual keyboard and screen reader checks

How to prioritise accessibility features for a small team

If resources are limited, focus on changes that remove the biggest barriers for the most users. Use this step-by-step approach.

1. Fix critical tasks: ensure users can sign up, buy, search and contact support by keyboard and screen reader.
2. Add captions and transcripts for your most viewed videos.
3. Improve headings and labels so content is scannable by assistive tools.
4. Ensure contrast and font size are adjustable on key pages like checkout and forms.
5. Run simple manual tests after each release: keyboard-only and at least one screen reader test.

Quick implementation tips

• Use native HTML controls first. They are more reliable than custom widgets.
• Write concise, meaningful alt text. Mark decorative images with empty alt attributes (alt=“”).
• Keep form labels visible and associate them with inputs using for attributes or wrapping elements.
• Don’t remove focus outlines. Style them if needed, but keep them visible.
• Offer user controls for captions, text size and contrast when possible.

How to test accessibility

Combine automated tools and manual checks for the best results.

Automated checks

• Run a scanner to catch obvious issues such as missing form labels and low contrast.
• Use a browser extension or CI tool to fail builds on regressions.

Manual checks

• Keyboard-only: try to complete primary tasks without a mouse.
• Screen reader: test with NVDA on Windows and VoiceOver on iOS or macOS.
• Caption check: read video captions for accuracy and timing.

Accessibility and standards

WCAG 2.1 and WCAG 2.2 define testable success criteria. Aim for Level AA for broad legal and practical compliance. Use WAI-ARIA when native HTML cannot express behaviour.

Checklist: must-have accessibility features

Feature	Why it matters
Keyboard navigation	Needed by people who cannot use a mouse
Alt text	Makes images readable by screen readers
Captions and transcripts	Helps deaf and hard of hearing users access audio content
Visible focus	Shows which control is active for keyboard users
Semantic headings	Improves navigation for assistive technologies

Next steps for teams

Start with a small audit of key journeys. Fix the top issues, then add testing to your release cycle. Keep documentation and ask people who use assistive tech to test real tasks.

Accessibility features are practical changes. They are also good product decisions. Small fixes often unlock large benefits for many users.