Here are some tools you can use to evaluate web site accessibility.
Online Web Accessibility Evaluators
Browser Plugins and Extensions
Chrome and Firefox
Google Chrome
- Google Chrome's Chromevox Extension
- SiteImprove Free Chrome Plugin
- NC State University's Color Contrast Analyzer for Chrome - Can be used to evaluate color contrast on an entire web page or a region of a page. Includes images of text in its analysis.
- Chrome Accessibility Audit - View > Developer > Developer Tools > Audits
Mozilla Firefox
Color Contrast Checkers
- WebAIM Color Contrast Checker
- Accessibility Color Wheel 2.0 - Simulates how text/background colors would appear to colorblind viewers.
- Luminosity Colour Contrast Ratio Analyser
- MSF&W Contrast Ratio Calculator
Screen Readers
- Freedom Scientific JAWS - Expensive, but robust, fully-featured, and often used by those with low vision
- NVDA (NonVisual Desktop Access) Open Source Screen Reader for Windows
- VoiceOver for iOS devices - In iOS, go to the Settings page, select General > Accessibility > Speech
Accessibility Testing Protocols
- Fluid's Accessibility Protocols and Checklists
- IBM's Web Accessibility Checklist
- The California State University Section 508 Manual Website Evaluation