Assistive Technology – Tools for Digital Accessibility
Assistive technologies are tools, software or devices that support people with disabilities in using digital products. They are the bridge between a person and a website – and only work when the website is technically implemented correctly. The best-known examples include screen readers, Braille displays, voice control and magnification software.
The term assistive technology covers both hardware and software. The WCAG use the term explicitly: criterion 4.1.2 requires that all UI functions must be compatible with assistive technologies. For people with disabilities, assistive technologies are often not optional extras but essential tools for digital participation.
A website that is not compatible with these tools systematically excludes these people – regardless of how well it is visually designed. WCAG conformance is the technical foundation that makes compatibility with assistive technologies possible in the first place.
Assistive Technology at a Glance
- Definition: Tools, software and devices for people with disabilities to enable digital participation
- Visual examples: Screen readers, Braille displays, magnification software, colour filters
- Motor examples: Head mouse, eye-tracking, voice control, switch control
- Auditory examples: Caption software, transcription services, visual notifications
- WCAG reference: Criterion 4.1.2 requires compatibility with assistive technologies
Assistive Technologies for Different Types of Disability
Different types of disability call for different assistive technologies. The following overview shows the most important tools and their digital functions – and what requirements they place on websites.
Visual: Screen Readers and Braille Displays
For blind and severely visually impaired people, screen readers are the most important assistive technology. They read web content aloud and enable keyboard navigation. The best-known examples are JAWS and NVDA for Windows and VoiceOver for Apple devices. Screen readers require semantically correct HTML, alternative texts and full keyboard accessibility.
Braille displays are hardware devices that output digital content as tactile Braille dots. They are often used in combination with screen readers. Magnification software such as ZoomText or the built-in magnification in Windows and macOS helps visually impaired people with residual vision.
Motor: Voice Control, Eye-Tracking and Switches
People with motor impairments use a wide range of assistive tools. Voice control – for example Dragon NaturallySpeaking – enables website operation by voice. Eye-tracking systems track eye movements to control the mouse pointer. Switch control enables navigation with a single button – essential for people with no arm or hand function.
All these assistive technologies share one prerequisite: the website must be fully keyboard-operable. Only then can alternative input devices reach all functions. Missing keyboard support renders motor assistive tools ineffective.
Auditory and Cognitive: Further Tools
For deaf and hard-of-hearing people, assistive technologies are primarily visual alternatives to auditory signals: caption software, visual notification systems and transcription services. These tools only work if websites do not convey important information exclusively through sound.
For people with cognitive disabilities – such as ADHD, dyslexia or autism – there is specialised software: reading aids that highlight text, dictionaries that explain terms or browser extensions that hide distractions on websites.
Why WCAG Conformance Is the Foundation
Assistive technologies depend on the technical quality of websites. A screen reader can only read what is programmatically readable. Eye-tracking can only click what is focusable. Voice control can only navigate what is keyboard-accessible. All tools share the same prerequisite: WCAG-compliant HTML.
The WCAG principles of Perceivability, Operability, Understandability and Robustness together form the foundation for compatibility with assistive technologies. Criterion 4.1.2 – Name, Role, Value – is directly aimed at assistive technologies: it requires that all UI functions are programmatically determinable.
SiteCockpit Solution
easyMonitoring: Check Compatibility with Assistive Technologies
easyMonitoring automatically checks whether your website meets the technical requirements for assistive technologies – including correct ARIA roles, accessible names for UI elements, full keyboard operability and semantically correct HTML. This lets you identify exactly where your website is not compatible with common assistive tools.
Discover easyMonitoring →Frequently Asked Questions about Assistive Technology
What is the difference between assistive technology and accessibility?
Accessibility describes a property of the website – it is either accessible or not. Assistive technology is the tool on the user's side. Both are interdependent: the best assistive technology is useless if the website is technically flawed. And an accessible website is of little use if people who need it have no access to assistive tools.
Which assistive technologies are most widely used?
Screen readers are the best-known assistive technologies in the digital context. According to the WebAIM Screen Reader User Survey, NVDA (Windows, free), JAWS (Windows, paid) and VoiceOver (macOS/iOS, built-in) are the most widely used. TalkBack is the default screen reader on Android devices.
Do I need to test my website with real assistive technologies?
For a complete accessibility audit, yes. Automated tools like easyMonitoring identify structural errors – but whether a website is actually usable with a real screen reader can only be confirmed through manual testing. NVDA for Windows is free and well-suited for initial testing.
Are assistive technologies only used by people with disabilities?
No. Many assistive technologies have become part of everyday life for everyone: Siri and Google Assistant are voice control, text magnification on smartphones is used by many people without disabilities, and autocorrect is a form of writing assistance. What is assistive technology today often becomes standard tomorrow.
Check Your Website for Assistive Technology Compatibility
With easyMonitoring, you can automatically check whether your website meets the technical requirements for assistive tools – and get concrete guidance on WCAG-compliant implementation.
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