What are some free accessibility testing tools available online?

1. WAVE (Web Accessibility Evaluation Tool): This tool is provided by WebAIM and is a widely-used accessibility testing tool. It offers automated and manual testing options and generates reports on accessibility issues.
2. Axe: Axe is a popular accessibility testing tool that can be used as a browser extension or as part of an automated testing suite. It provides detailed reports on accessibility issues and suggests remediation options.
3. Google Lighthouse: Google Lighthouse is a web auditing tool that can be used to test for accessibility issues, as well as performance and other web development best practices. It provides detailed reports and recommendations for improvement.
4. Tenon: Tenon is an automated accessibility testing tool that provides both web-based and API-based testing options. It offers detailed reporting and integration with popular web development tools.

These are just a few of the many free accessibility testing tools available online. It's important to note that automated testing tools can only catch a certain percentage of accessibility issues, and manual testing by an accessibility expert is often necessary for a complete assessment of accessibility.