The following are online free web accessibility tools and resources. Not all reports and validators are the same. I recommend you test your site’s various pages with at least five of these to get a better sense of what needs improvement and what passes the tests.

Accessibility Online Checks, Tests, and Validators

• IDI Web Accessibility Checker : Web Accessibility Checker
• Aaron Cannon’s Web Accessibility Checklist – Authentic Boredom
• Functional Accessibility Evaluator (FAE)
• MAGENTA Accessibility Validator (Beta)
• Fixit – Alt Texts – mobiForge
• EvalAccess
• Accessibility Valet
• WAVE – Web Accessibility Evaluation Tool
• WebAIM: Design Considerations – Text-only Versions
• Canoo WebTest
• Prettier Accessible Forms
• BIK BITV-Test – Overview
• Full Options – Cynthia Says Portal Tester
• Web Accessibility Inspector – Fujitsu Global
• Web standards checklist – Max Design
• Accueil – Ocawa validateur d’accessibilité
• Web Accessibility Checker : Stanford Online Accessibility Program
• TAW – Servicios de accesibilidad y movilidad web
• IBM Research – aDesigner
• Complete List of Web Accessibility Evaluation Tools

Accessibility Guidelines, Regulations, and Policies

• PubbliAccesso – Normative – Law n. 4, January 9, 2004
• United States Section 508 Guidelines
• Common Accessibility Mistakes — Visual28
• Web Content Accessibility Guidelines 1.0
• G17: Ensuring that a contrast ratio of at least 7:1 exists between text (and images of text) and background behind the text – Techniques for WCAG 2.0
• Web Content Accessibility Guidelines (WCAG) 2.0
• Appropriate Use of Alternative Text
• Separate text-only version? No thanks!

Vision and Color

• Color Oracle
• Gimp Display Filters for Deficient Vision
• Accessibility Color Wheel
• Gray Bit
• Juicy Studio: Luminosity Colour Contrast Ratio Analyser
• Sim Daltonism
• How to Install the Colorblind Applet on GNOME – Softpedia
• Colour Contrast Visualiser – stainlessvision
• WebAIM: Color Contrast Checker
• AccessColor Tool
• Check My Colours
• Colour Blindness Check – Etre
• ColorDoctor – Fujitsu Global
• Contrast Analyser for Windows and Mac – The Paciello Group
• Colour Contrast Check – snook.ca
• Vischeck

Accessibility Emulators

• Web Anywhere
• Screen Reader Simulation
• Fangs Screen Reader Emulator
• Yellowpipe Lynx Viewer Tool
• Web Accessibility Initiative – Accessible Rich Internet Applications (ARIA) developer portal
• Introduction to WAI ARIA by Gez Lemon
• Henny Swan (Opera): Setting up a screen reader test environment for WAI-ARIA

Firefox Extensions and Tools for Accessibility

Firefox has the Access Firefox team working overtime to ensure Firefox complies with web standards but also helping to support and promote accessibility extensions in Firefox. The following is a list of many of those tools which include accessibility assists, emulators, validators, and more. Not all of these may work with the latest version of Firefox, and newer alternatives may be available, so check Access Firefox and the Firefox Extensions List for updates.

• Firefox Accessibility Extension
• CLiCk Speak for Firefox
• ImageTweak for Firefox
• Page Zoom Buttons for Firefox
• Reader for Firefox
• Theme Font & Size Changer for Firefox
• Juicy Studio: Colour Contrast Analyser Firefox Extension
• Fire Vox
• Accessibility Evaluation Toolbar
• Default FullZoom Level
• FireGestures
• HYPER-ANCHOR
• Image Zoom
• Mouseless Browsing
• Noise
• Wired-Marker
• Yellowpipe Lynx Viewer Tool (Emulator)
• Fangs Screen Reader Emulator