How many different screen readers should be tested to ensure website accessibility?

Testing a website's accessibility across multiple screen readers is vital for ensuring that it is usable for as many users as possible, particularly those who rely on assistive technologies. Each screen reader has its own unique features, interpretation of web content, and approach to accessibility standards.

By testing with five different screen readers, you cover a broader spectrum of user experiences and environments. This includes popular screen readers, such as JAWS, NVDA, VoiceOver, and others, ensuring that users with varying preferences and platforms, whether they are using Windows, macOS, or mobile devices, have a consistent and effective browsing experience.

Moreover, using a wider range of screen readers helps identify specific accessibility issues that might be unique to a particular tool, thus facilitating improvements in the website's design and functionality. Comprehensive testing leads to a more inclusive web experience and ensures compliance with accessibility standards, such as the WCAG (Web Content Accessibility Guidelines).