WAVE Web Accessibility Evaluation Tool.
This site will allow you to put your Web address in and give you feedback on areas of your website and pages that have Errors, Alerts that need to be fixed for those that are visually impaired.
Wave also has an Chrome Extension that they offer.
The WAVE Chrome extension allows you to evaluate web content for accessibility issues directly within Chrome. Because the extension runs entirely within your web browser, no information is sent to the WAVE server. This ensures 100% private and secure accessibility reporting. The extension can check intranet, password-protected, dynamically generated, or sensitive web pages. Also, because the WAVE Chrome extension evaluates the rendered version of your page, locally displayed styles and dynamically-generated content from scripts or AJAX can be evaluated.
WAVE is developed and made available as a free community service by WebAim. Originally launched in 2001, WAVE has been used to evaluate the accessibility of millions of web pages.