NVDA
What Is NVDA?
NVDA (NonVisual Desktop Access) is a free, open-source screen reader for Microsoft Windows. It provides spoken feedback and braille output, helping blind and visually impaired users interact with digital content. NVDA is developed and maintained by NV Access, a non-profit organization.
System Compatibility and Portability
NVDA works on Windows 7 through Windows 11, including server editions. It can be run from a USB flash drive without needing installation, making it easy to use on shared or public computers.
Key Features
NVDA includes a built-in speech synthesizer with support for 55+ languages, compatibility with many refreshable braille displays, braille input support, smooth integration with modern browsers and Microsoft Office, text formatting announcements (font, size, style, spelling errors), mouse position sounds, and portable use without installation.
Relevance to Accessibility Compliance
NVDA is widely used for web content testing by both users and developers. Compatibility with NVDA helps ensure that websites are perceivable and operable for blind users, aligning with WCAG success criteria. Developers should test with screen readers like NVDA to evaluate keyboard access, focus order, labeling, and dynamic content updates.