Web Accessibility Assessment Tools

Acc - an Accessibility Evaluator

Acc - an Accessibility Evaluator is a developing Firefox Extension, which is capable of evaluating and reporting some accessibility criteria. Acc - an Accessibility Evaluator can spot some basic explicit HTML-coding flaws like other tools, but it includes features like: Visual layout extraction implementation; Basic scalability test; Deeply nested layout tables test; Skip to Main Content link check; Navigation consistency check compared to previous page; and Scripted page evaluation.

AccessColor

AccessColor is a free online tool which analyses the internal and external CSS of a web page to test the color contrast and color brightness between the text and background colors. It uses the algorithm recommended by the W3C at http://www.w3.org/TR/AERT#color-contrast.

Accessibility Audit of One Page

By Operational Control and Analysis for Web Accessibility (OCAWA). This online tool tests the accessibility of your web site using international accessibility standards.

Accessibility Check

Etre's Accessibility Check evaluates your page against subset of the WAI guidelines. These guidelines form the basis of most global legislation relating to accessibility.

Accessibility color wheel

A tool that helps in the choice of a color pair (text/background) to use in a web page. It simulates three kinds of color blindness and it shows the result of w3c algorithms, that compute contrast and difference of brightness, applied to the chosen colors. The accessibility color wheel shows if the color pair is "good" from an accessibility point of view.

Accessibility Wizard

The Accessibility Wizard is a tool for web developers and project teams. It breaks down the WAI Checkpoints into individual tasks for each job role in a development team. Every member of a development team is directed to implement the WAI Checkpoints at a specified conformance level (A,AA or AAA). This is a sure way of meeting accessibility conformance. A web client that supports the Flash 6 (or higher) plug-in is the minimum requirement to use the wizard.

Accessible Form Creator

The HiSoftware Accessible Form Creator allows you to create forms for web sites containing all the additional markup required to make the forms accessible under Section 508 standards and the W3C WCAG 1.0 Priority 1-3 Guidelines.

Accessify.com — Tools and wizards

Tools and wizards to help make your web site more accessible more easily...

List-O-Matic: Generate navigation bars based on list items (<li>) that are styled with CSS. It's as easy as falling off a chair, only less painful.

Acrobot Abbreviation and Acronym Generator: Lets you quickly convert blocks of text that feature well-known abbreviations and acronyms into something more accessible. This tool will wrap a <abbr> or <acronym> tag around any matched entries. Thus, if you enter "W3C", it will be converted to <abbr title="World Wide Web Consortium">W3C</abbr>.

Accessibility Toolbox: a downloadable version of a selection of the tools found on this site to use while offline. It's a basic tool only and is comprised of a Pop-up Window Generator, a Form Element Generator and a Form Builder.

Dreamweaver 4 Accessibility modifications: A selection of modified DreamWeaver 4 objects that offer better accessibility options, including <abbr>, <acronym> tags and additions of title, class, and id attributes on other tags. The <table> dialogue has also had a make-over, accepting a summary and caption attribute.

Accessible Form Builder (version 2): assists in creating an accessible form using either a traditional table layout or CSS.

Pop-up Window Generator: a tool to quickly let you generate a link that is both accessible and XHTML compliant.

Accessibility-checking favelets: Little pieces of JavaScript that can be saved as favourites in Internet Explorer, Mozilla and Opera. You may find these useful for checking features of a page (for example, what links are present, images missing alt attributes etc).

Form element generator: Lets you easily build individual form elements that are accessible (requires JavaScript to work)

Accessible table builder: You choose what table properties you want, how many rows and columns, and the tool takes care of the accessibility mark-up for you.

Accessible Form Builder: A hybrid of the Form Element Generator and the Accessible Table Builder. This tool lets you enter a number of fields for text input, then creates a table (or Cascading Style Sheets-based layout) to lay them out in, and puts in the necessary mark-up for accessibility. Forms have never been quicker!

A-Checker

Online accessibility checker that tests web pages for conformance to various accessibility guidelines.

aDesigner

The aDesigner is a disability simulator that helps Web designers ensure that their pages are accessible and usable by the visually impaired. The tool looks at such elements as the degree of color contrast on the page, the ability of users to change the font size, the appropriateness of alternate text for images, and the availability of links in the page that promote navigability. The tool also checks the pages's compliance with accessibility guidelines. The result of this analysis is a report listing the problems that would prevent accessibility and usability by visually impaired users. In addition, each page is given an overall score. With this information, Web developers get immediate feedback and can address these obstacles before the pages are published.

AnyBrowser.com

The AnyBrowser online utility can determine whether or not a Web page will render correctly in a variety of browsers. This tool can aid in the assessment of Web page accessibility by allowing the user to view a page in various screen sizes/resolutions and with images replaced by ALT text. HTML and link validation utilities, search engine tools, and other browser compatibility tests are also available.

A-Prompt

A-Prompt (Accessibility Prompt) has been developed to assist Web authors in improving the accessibility and usability of HTML documents. In its current format (standalone Windows application), A-Prompt allows the author to select a file for validation and repair, or a single HTML element within a file. The tool may be customized to check for different Web Accessibility Initiative (WAI) Web Content Accessibility Guidelines 1.0 conformance levels. If an accessibility problem is detected, A-Prompt displays dialogs that guide the user in fixing the problem.

ART Simulator

The ART Simulator - simulates a site in different ways to help developers gauge how easily the disabled can use the site. The simulator, the first tool of its type, serves two critical purposes: It enables site owners and developers to both experience first-hand the barriers to accessibility faced by the disabled and to better understand how to improve disabled users experience.

Color Blindness Check

Color Blind Check is a little tool for people to test their WebPages with. It re-colorizes any webpage you like into a palette that closely resembles the typical palette available to a person having a red/green color vision deficiency (It approximates to Protanopia).

Color Blindness Simulator

One in twenty people have some form of color vision deficiency. Etre's Color Blindness Simulator allows you to upload an image to experience it as color blind users may.

Color Check

Etre's Color Check determines the color difference and contrast between any two colors to maximize readability.

Color Contrast Analyzer

It is primarily a tool for checking foreground & background color combinations to determine if they provide good color visibility. It also contains functionality to create simulations of certain visual conditions such as color blindness. Determining "colour visibility" is based on two sets of algorithms: Luminosity Contrast Ratio and Color Difference and Brightness Difference, suggested by the World Wide Web Consortium (W3C).

Color Contrast Analyzer

The Color Contrast Analyzer is a tool for checking foreground & background color combinations to determine if they provide good color visibility for conformance with Checkpoint 2.2 of the Web Content Accessibility Guidelines 1.0. It determines color visibility based on algorithms suggested by the W3C - Two colors are considered to provide good color visibility if the brightness difference and the color difference between the two colors are greater than a set range. In addition to analyzing contrast for normal vision it also calculates results for three types of color blindness (Protanopia, Deuteranopia and Tritanopia).

Color Filter

Several filters to manipulate images and other file types to see how they may appear for other users.

Color Laboratory

This color laboratory allows you to select colors and see how they appear next to one another, and in various foreground/background combinations. It also allows you to see those colors as they might appear to color-blind users.

ColorDoctor

ColorDoctor is a simulating program that checks accessibility from the aspect of color. It converts any images displayed on the screen such as websites including Web 2.0, and other presentation contents, into gray scale or colors that person who has color blindness perceives.

ColorSelector

ColorSelector is a program that provides a real-time evaluation of whether or not the colors of a website's texts and backgrounds are easily viewable by people with cataracts or color blindness. At the time of developing a website including Web 2.0, and other presentation contents, ColorSelector determines whether the selected color combinations of text and background are easily readable, and further it displays the most appropriate combination. In this manner, it assists in the creation of visual contents with a high level of accessibility.

Common Look and Feel Self-Assessment GuideSecretariat

The CLF Self-Assessment Guide has been developed by the Treasury Board Secretariat for departments and agencies to determine the compliance level of their Internet Web sites with the Common Look and Feel Standards.

Complex Table Mark-up Toolbar

The toolbar is an add-on to FireFox and can be used to: reveal "headers" and "id" complex data table mark-up; create such mark-up either manually or automatically; and create a linear version of the data table content. Complex data table mark-up is needed for screen reader users in order to make sense of a complex data table. Screen readers support (in varying degree) complex mark-up.

Contrast Analyser for Apple MAC

the Contrast Analyser is primarily a tool for checking foreground & background colour combinations to determine if they provide good colour visibility. It also contains functionality to create simulations of certain visual conditions such as colour blindness. Determining "colour visibility" is based on the Contrast Ratio algorithm, suggested by the World Wide Web Consortium (W3C).

Contrast Checker

The Q42 contrast checker tool enables you to compare the contrast in a web page. This is done by comparing the text color with its background for each element with contents. The contrast is determined by comparing the brightness of the foreground and background color, and the absolute color difference. Note that this is only a tool for improving accessibility, not a strict guideline. If you're not sure about the results, you should consult other methods. There are two ways to integrate the contrast checker in to your browser - as a bookmarklet (also known as a favelet) to your browser, or on the context menu (this will provide you with tight browser integration, even enabling you to run the contrast checker in frames).

CSS Analyzer

This service has been provided to allow you to check the validity of your CSS against the W3C's validation service, along with a color contrast test, and a test to ensure that relevant sizes are specified in relative units of measurement.

EvalAccess

EvalAccess 2.0 is an on-line web accessibility evaluation tool which has been developed using Web Service technology. Due to its architecture it can be easily integrated into other applications such as authoring tools. This tool provides different methods for evaluating web accessibility: evaluation of a single web page, evaluation of a web site and evaluation of HTML mark-up. It returns a complete report of errors as a result of the evaluation.

Fangs

Fangs is a Mozilla Firefox extension that displays a text representation of a web page, simulating the manner in which it might be read by a screen-reader. This may aid web developers in finding accessibility issues at an early stage in the UI development process.

Fire Vox: A Screen Reading Extension for Firefox

Fire Vox is an open source, freely available talking browser extension for the Firefox web browser. Think of it as a screen reader that is designed especially for Firefox. In addition to the basic features that are expected of screen readers, such as being able to identify headings, links, images, etc. and providing navigational assistance, Fire Vox provides support for MathML and CSS speech module properties. It also works on Windows, Macintosh, and Linux.

firefox longdesc extension

A firefox extension that adds a "View Image Longdesc: ..." option to the browser's image context menu. The "longdesc" attribute for an image element allows authors to use the graphic as a link to a "long description" of a complex image for use by screen-reader users. The longdesc is not indicated/displayed by main-stream browsers.

Foreground/Background Color Contrast Analyzer

Calculates Foreground and Background color contrast and difference per W3C algorithms. This is a web-based, platform independent tool. It requires that JavaScript is enabled in your browser.

GetContentSize

Enter a URL, and find-out the following three statistics for the page:

The size of the page, in bytes (just the HTML page -- no images, associated JavaScript or CSS files)

The size of the page's "text content"

The percentage of the page's weight devoted to text content

Header Ordering Checker

The University of Durham Header Ordering Checker linearizes each page and checks the order of heading tags. It will give a warning for each improperly ordered header. A page's HTML should be validated before using this utility, as improperly matched headers, or headers within headers could cause problems.

Hera

A web-based system that performs some automated WCAG 1.0 testing, then guides a user through tests which need to be done or confirmed manually. Hera is multilingual (you can change on the fly), and a translation interface is available to easily add new languages. Hera development is ongoing, and is mostly in Spanish. The system is written in PHP and is available for adaptation under the GPL open-source license.

Hermish website accessibility tool

The Hermish Website Accessibility Tool is designed to assist developers in making Web pages that comply with the W3C Web Content Accessibility Guidelines (WCAG). Hermish can check a document for Section 508 compliance as well.

HiSoftware® Cynthia Says™ Portal

The HiSoftware Cynthia Says Web portal is a web content accessibility validation solution, it is designed to identify errors in your content related to Section 508 standards and/or the WCAG guidelines. Unlike HiSoftware's Desktop Software, AccVerify, this online test only validates one page at a time.

HTML Validator for Firefox and Mozilla

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing. The details of the errors are seen when looking the HTML source of the page.

html2txt

An online service to convert web pages to plain text.

HTMLShlEx

This tool is Windows shell extension for HTML Documents. After it is installed, a page's html file can be up-loaded to some validators from the right-click menu.

IBM Rule-based Accessibility Validation Environment (RAVEn)

The IBM Rule-Based Accessibility Validation Environment (RAVEN) is an innovative suite of tools for inspecting Java and web rich-client graphical user interfaces (GUIs) and validating them for accessibility. Non-invasive techniques, like Aspect Oriented Programming (AOP), Introspection, and the Java Reflection API, are used to validate pre-existing GUIs at execution time rather than by examining source-code. This tool provides the ability to: Validate your static web content and some DHTML content for accessibility; Inspect and validate your Eclipse plug-in in the current Eclipse workbench; Inspect and validate your plug-in (and/or Eclipse itself) in an Eclipse workbench running in a separate JVM; Inspect and validate your Java application running in a separate JVM; Validate GUI components under development from the Java Perspective; Launch, test, and use RAVEN to validate Eclipse plug-ins from your development environment using the Runtime Workbench ; Define your own validation rules via external XML files; Persist validation reports.

Illinois Accessible Web Publishing Wizard

The Illinois Accessible Web Publishing Wizard for Microsoft® Office provides a simple way to create highly accessible and standards compliant web versions of Microsoft Office documents (Word, PowerPoint, Excel) that are more accessible and usable by everyone, including people with disabilities. The HTML generated by the Wizard supports everyone from legacy browsers and slow Internet connections to the needs of blind users with screen readers. The Wizard does this through the support of W3C XHTML, CSS, & Web Content Accessibility Guidelines (WCAG) and the US federal government's Section 508 accessibility requirements.

Juicy Studio: Color Contrast Analyzer Firefox Extension

The Color Contrast Analyzer Firefox extension lists color combinations used in the document in a table that summarizes the foreground color, background color, luminosity contrast ratio, and the color difference and brightness difference used in the algorithm suggested in the 26th of April 2000 working draft for Accessibility Evaluation and Repair Tools (AERT). Each element is also listed with its parent elements, and class and id attribute values when specified to make it easier to locate the elements.

Juicy Studio: Complex Table Inspector

Developers are encouraged to use summary, headers, axis, scope, and abbr for complex data tables to aid usability and accessibility. To help developers determine if they've used those features correctly, author Gez Lemon created a complex table instector bookmark that reveals the hidden information.

Juicy Studio: Image Analyzer

This service examines all images found on a web page to check for any accessibility issues. The width, height, alt, and longdesc attributes are examined for appropriate values.

Juicy Studio: Readability Test

Gunning Fog, Flesch Reading Ease, and Flesch-Kincaid are reading level algorithms that can be helpful in determining the readability of written content. Reading level algorithms only provide a rough guide, as they tend to reward short sentences made up of short words. Although they're rough guides, they can give a useful indication of whether content is targeted at the correct level for an intended audience. The Juicy Studio Readability Test automatically calculates a readability score for a Web page just by entering its URL.

Juicy Studio: Table Inspector Firefox Extension

Table Inspector is a Mozilla - Firefox extension to reveal the hidden accessibility features of data tables, such as summary, headers, axis, scope, and abbr.

Luminosity Contrast Ratio Analyzer

The Luminosity Contrast Ratio Analyzer (Beta) enables allow foreground and background color combinations to be tested against the suggested luminosity contrast ratio algorithm (http://juicystudio.com/article/luminositycontrastratioalgorithm.php) being considered by the W3C for WCAG 2.0.

Lynx viewer

Simulates how a page will look in the Lynx text browser. Links on the page can be activated. If you follow links in the resulting page, they will also be filtered through Lynx viewer. It also handles frames the way Lynx does. However, doesn't not give menu of the ALT text or URL's of AREA elements like lynx does. Perl Source is posted at the site.

Lynx viewer

The Lynx Viewer allows webmasters to see what their pages will look like when viewed with Lynx, a text-mode web browser. It is also presumably, how search engines see your site. In addition to that, it can help determine if web pages are accessible to the vision impaired.

Macaw

Macaw is a Free Program That Helps in Adding Text Tracks to QuickTime Video. Versions are available for both Mac and Windows platforms.

Media Access Generator (MAGpie)

MAGpie is a free JAVA-based application for creating captions and audio descriptions for QuickTime, Real and Windows Media content. MAGpie is available for use on both the Windows and Mac OS X platforms.

mod_accessibility

mod_accessibility is a fully automatic aid to making websites more accessible. It serves to improve Websites and Intranets for everyone:

For users, a range of accessibility options to choose from.

For developers and webmasters, an accessibility-enhanced version of your site for no effort.

For managers, a major step towards ensuring you meet your obligations under disability discrimination law.

For server administrators, a simple plugin that doesn't hit your server, nor involve a learning curve and new support requirements.

For ISPs and Web hosts, a value-added service for your customers.

It can be used with any Apache 2.0 server, and works as an output filter, transforming documents as they leave the server. This means it can be used with any content-generation software (such as CGI, PHP, mod_xml, or as a proxy server with mod_proxy) without any need for special configuration. It will of course also work with other output filters, such as an XSLT, character encoding, or encryption (SSL) modules.

Mozilla/Firefox Accessibility Extension

The Mozilla/Firefox Accessibility Extension adds features to Mozilla or Firefox to make it easier for people with disabilities to view and navigate web content based on the structural markup used to create the web page. The Mozilla/Firefox accessibility extension can be used directly by everyone to navigate the structure of a HTML web resource. It can be used by authors to check their structural markup to make sure it matches the actual content structure of the resource.

NetMechanic

Using Keynote NetMechanic services you can improve the functional integrity of your Web site and optimize your site to be reached by more potential customers.

NIST WebMetrics Tool Suite

Usability and accessibility testing tools for websites: Web Static Analyzer Tool (WebSAT) - checks HTML against typical usability guidelines. Web Category Analysis Tool (WebCAT) - helps a usability engineer with web category analysis/card sort, Web Variable Instrumenter Program (WebVIP) instruments a website to log of user interaction, Framework for Logging Usability Data (FLUD) - a file format and parser for representation of user interaction logs, FLUDViz - produces a 2D visualization of a single user session, VisVIP - produces a 3D visualization of user navigation paths, TreeDec - adds navigation aids to website pages.

Office 2000 HTML Filter

The Office HTML Filter is a tool you can use to remove Office-specific markup tags embedded in Office 2000 documents saved as Hypertext Markup Language (HTML). Once you have completed editing an HTML document in Word 2000 or Excel 2000, you can use the Office HTML Filter to remove the Office-specific markup tags from the final copy of the HTML document. Features of V2.0 include: control over which types of markup tags are removed; export a cascading style sheet file based on a Word 2000 document; copy any fragment of a Word document as HTML.

Opera

A free, fast, highly standards-compliant Web browser that allows you to toggle images, style sheets, scripting, and tables on and off with a single mouse click. These features allow designers to check alt-text, see how tables linearize, and ensure that pages work with style sheets turned off.

Page Valet

Formal validation of HTML and XML, based on an Apache module (available under the GPL). Choice of report formats including cross-referencing errors to the code. Backend parsers supported are OpenSP (SGML/HTML, the same as the W3C validator) and Xerces (offering full XML support).

PEAT - Photosensitive Epilepsy Analysis Tool

Photosensitive Epilepsy Analysis Tool (PEAT) is a free, downloadable tool, available from the Trace Center at the University of Wisconsin-Madison that allows web content to be tested for compliance with these guidelines. The tool creates a recording of a computer monitor as you use it. With this screen capture as input, PEAT conducts luminance flash and red flash evaluations to determine risk of seizure-provoking content. The analysis uses algorithms developed specifically for web and computer applications by the Trace Center, Dr. Graham Harding, and Cambridge Research Systems working together, and is based on Dr. Harding's extensive research on photosensitive seizure disorders.

Readability index calculator

A simple tool where you can calculate a readability index score for a text of your choice. The calculator uses the following formulas: English: Flesch-Kincaid reading ease and grade level; Spanish: Fernandez Huerta; French: Kandel & Moles; Swedish, Danish: LIX.

Readability.info

Curious about how complex your documents or Web pages are to read? You don't have to get a team of experts to generate your readability score: you can just use readability.info to analyze the characteristics of your writing and ascertain a multitude of readability scores (Kincaid, ARI, Coleman-Liau, Flesch, Fog, Lix and SMOG). By comparing the readability score of different documents (or Web pages) you can better hone your writing and make sure that you aren't creating overly complex sentences and paragraphs for your audience. Find out for yourself where your writing style places your prose compared to other Web pages and writing samples by choosing to either:

Upload a Microsoft Word Document

enter a URL

Reading Effectiveness Tool

The tool helps in finding out if a draft manuscript is at the right Grade Reading Level for the intended audience, by asking a series of questions. It is based on the Simple Measure Of Gobbledegook (SMOG) readability formula.

Reading Level Calculator

The Reading Level Calculator is a web tool based on the SMOG readability formula. This form relies on client-side scripting to calculate the reading level.

Relaxed HTML Validator

"Relaxed" is an easy to use HTML validator implementation which doesn't use the official W3C DTD's. It rather validates HTML documents using it's own schema definitions written in Relax NG with embedded Schematron patterns. This is an extremely expressive combination of languages which enables validation of additional restrictions which can not be expressed using DTD. This includes most restrictions specified in the W3C HTML 4.01 and the W3C XHTML 1.0 recommendation and some restrictions from WAI WCAG 1.0 Guidelines. "Relaxed" features also basic support for compound documents validation e.g. XHTML1.0+SVG1.1, XHTML1.0+MathML2.0 and XHTML1.0+MathML2.0+SVG1.1.

Simply Web 2000

Simply Web 2000 is a speech-friendly, speech-enabled accessible web browser with advance features that allow easy navigation of complex pages by blind users. The Simply Web 2000 package includes a software based speech synthesizer and can be used in standalone mode as a "Talking Web Browser."

Speak It

A Firefox extension that reads pages or selected text using microsoft tts engine.

STEP508

STEP508 is a new electronic tool that...

Prioritizes the repairs becessary to ensure that a Web site is compliant with the accessibility requirements of Section 508.

Provides the metrics to report progress in improving the accessibility of a site over time.

STEP508 uses the output of accessibility evaluation tools * (such as Bobby, LIFT, WebKing etc.) and...

Compares the results of these evaluations

Prioritizes the errors/accessibility problems that were identified

Tracks the progress of accessibility repair efforts over time

Style and Diction

Diction identifies wordy and commonly misused phrases. Style analyses surface characteristics of a document, including sentence length and other readability measures.

Tablin

Tablin is a filter program that can linearize HTML tables and render them accordingly to preferences set by the presentation layer (e.g. the screen reader end-user).

TAW Online

TAW (Web Accessibility Test) is an online tool for the accessibility analysis of Web sites based on the W3C Web Content Accessibility Guidelines 1.0 (WCAG 1.0), which provides a useful in-page feedback. Its goal is to analyze the level of accessibility in the design and development of Web pages to allow access for all, regardless of their specific characteristics.

TAW Standalone

This downloadable version of TAW is a multiplatform desktop software that complements and extends the functionality of TAW Online analyzer performing several automatic tests and guiding users through those checks that require human judgment and must be evaluated manually. It follows the links of HTML documents so that it allows to examine a single page or the whole Web site. It is also possible to select the checkpoints to be verified and to create customized rules. Additionally, the tool can generate different types of test result reports.

TAW with a click

'TAW with a click' is a Firefox extension that once installed will display an icon on your browser's status bar allowing you, by clicking the icon, to easily and quickly verify the accessibility of the Web sites visited, based in the W3C Web Content Accessibility Guidelines (WCAG 1.0), by means of the TAW Online service (www.tawdis.net).

Tidy

A quorum of developers have pitched in on a SourceForge project to maintain and further develop Dave Raggett's excellent HTML Tidy program. We have two primary goals. First, to provide a home where all the patches and fixes that folks contribute can be collected and incorporated into the program. Second, a library form of Tidy has been created to make it easier to incorporate Tidy into other software.

Truwex Online Check for Web Accessibility and Quality

Truwex online tool to check web site accessibility (WCAG 1.0 and Section 508), privacy, and quality. It features automatic color contrast validation of text elements according to W3C algorithm. It shows issues on a web page screenshot. Truwex executes JavaScript’s and measures actual response and download times of every web page element in the Internet Explorer 6.0 browser.

Vischeck

Vischeck is a way of showing you what things look like to someone who is color blind. You can try Vischeck online - either run Vischeck on your own image files or run Vischeck on a web page. You can also download programs to let you run it on your own computer.

Visolve

Visolve is software that transforms the computer display colors into the discriminable colors for various people with color blindness. One of its aims is to help people with color blindness guess a normal color. In addition to the color transformation, it provides the following two functions: the filtering darkens all colors other than the specified color, and the hatching draws different hatch patterns depending on color.

Visual Impairment Simulator for Microsoft Windows

Provide almost real time full screen simulation of various visual impairments on Microsoft Windows 2000 or XP. Tool is useful for testing for the use of colors and learning about how people with visual impairments perceive information.

W3C CSS Validation Service

W3C CSS Validation Service is a free service that checks Cascading Style Sheets (CSS) in (X)HTML documents or standalone for conformance to W3C recommendations.

W3C Markup Validation Service

a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.

WAEX online

WAEX is a Web Accessibility Evaluator in a single XSLT file. Such XSLT file can be applied (with any XSLT platform) to generate accessibility reports. These reports also include constraint evaluation of the XHTML specification not expressed/expressible in the DTD/Schema of XHTML.

WAEX standalone

WAVE

WAVE exposes errors and highlights content where accessibility considerations require human judgment(e.g. WAVE exposes alt text so a human evaluator can determine whether it is appropriate for the image). Icons are used as feedback elements within the web page being evaluated.

WDG HTML Validator

The WDG HTML Validator validates against W3C HTML DTD's. Own DTDs to support non-standard HTML features can be added such as the EMBED element or the LEFTMARGIN attribute on BODY.

Web Accessibility Inspector

Web Accessibility Inspector is a program that can determine whether or not your website can be easily viewed by the elderly and those with visual impairments. The criteria of Web Accessibility Inspector are based on W3C WCAG 1.0 and Fujitsu Web Accessibility Guidelines. It can evaluate not just HTML but also CSS (Cascading Style Sheets), and enables to diagnose at a high level of precision, including text size, line spacing, and the color of texts and backgrounds.

Web Accessibility Self-Evaluation Tool

This simple web accessibility self-evaluation tool has been designed to provide website developers with a simple and pragmatic step-by-step approach to conducting an internal or self-evaluation. This tool is suitable for use with institutional websites, personal academic homepages and other information sites. However, this tool is not suitable on its own as a tool for the evaluation of e-learning or e-resource material. This tool has been designed to provide developers with a simple holistic overview of the accessibility of a website. The tool takes advantage of free online automatic evaluation tools, heuristic evaluation methods (where the reviewer is required to evaluate a site against a guideline or principle), and takes a methodical approach to identifying potential issues.

Web Accessibility Toolbar

The Web Accessibility Toolbar has been developed to aid manual examination of web pages for a variety of aspects of accessibility. It consists of a range of functions that: identify components of a web page, facilitate the use of 3rd party online applications, simulate user experiences and provide links to references and additional resources.

Web Accessibility Toolbar [For Opera]

The Web Accessibility Toolbar has been developed to aid manual examination of web pages for a variety of aspects of accessibility. It consists of a range of functions that: 1.identify components of a web page; 2.facilitate the use of 3rd party online applications; 3.provide links to references and additional resources.

Web Developer Extension

The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools. It is designed for Firefox, Flock, Mozilla and Seamonkey, and will run on any platform that these browsers support including Windows, Mac OS X and Linux.

WebXACT

WebXACT is a free online service that enables users to test single pages of web content for accessibility, quality and privacy issues. Can be integrated into the browser via favelet or similar technology.