Here are some free tools and browser toolbars that web developers may use to check a website’s accessibility according to international standards and guidelines.
Accessibility markup analyzers
- Accessibility Bookmarklets
- AIS Web Accessibility Toolbar
- Provided by AIS, the Web Accessibility Toolbar (WAT) functions on Windows XP with Internet Explorer 5+. The WAT can be used to check many of the Checkpoints from the Web Content Accessibility Guidelines (WCAG).
- Accessibility Evaluation Toolbar
- Provided by Firefox, the toolbar aids web developers in testing resources for accessibility based on iCITA HTML Best Practices.
- AInspector Sidebar
- AInspector Sidebar is an add-on for Firefox. Once downloaded, the sidebar evaluates the current (and then each subsequent) page that the user loads in the browser within a single tab. AInspector also provides screen reader support for column header information.
- Functional Accessibility Evaluator (FAE) 2.0
- Developed by the Open Accessibility Alliance and OpenAjax Accessibility Task Force, the FAE analyzes web pages for the W3C Web Content Accessibility Guidelines 2.0.
- WAVE (Web Accessibility Evaluation Tool)
- Provided by WebAIM, WAVE can be used directly within Firefox and Chrome.
- Web Accessibility Toolbar (WAT) for IE
- The WAT can be downloaded and used to manually examine webpages for accessibility
- WorldSpace Attest DevTools
- Created by Deque, this tool is built into the Chrome inspect tools to scan for accessibility issues within a website and outputs solutions to fix these. It also provides screen reader simulation, utilize custom rulesets, and be integrated with WorldSpace Comply.
- W3C CSS Validator
- May be used to check CSS and (X)HTML documents with style sheets.
- W3C HTML Validator
- May be used to check the markup of Web documents.
Color contrast analyzers
- Accessible Colors
- Accessible Colors uses the combination of hex colors and data on the text size to output a pass or fail by WCAG 2.0 standards. It also provides possible solutions if the inputed color combination fails.
- Color Contrast Analyzer for Chrome
- Developed by North Carolina State University, the Color Contrast Analyzer for Chrome analyzes text over images or gradients, text in images, and gives a contrast-overview of the webpage to be analyzed.
- Color Pallet Accessibility Evaluator
- Developed by North Carolina State University, the Color Palette Evaluator compares submitted color combinations to see which colors comply with WCAG 2.0 specifications.
- Colorblind Web Page Filter
- Provided by wickline.org, the Colorblind Web Page Filter allows users to type a URL and then choose the color filter to test from a dropdown menu.
- Contrast-A is a color combination checker that checks color contrast in accordance with the WCAG. Contrast-A can simulate the results of various types of color deficiencies.
- WebAIM Color Contrast Checker
- Allows you to enter a selected foreground and background color and produce a score for contrast, as well as an example. It also provides functionality to lighten or darken selected colors to find a more accessible luminosity.
Screen reader emulators
- Fangs (Screen Reader Emulator)
- Fangs is an Add-on to Firefox and is used by developers to find issues in web pages that might affect people using a screen-reader. The Add-on is free, but you can choose to make a $2 donation before you download it.