As I mentioned above, under each WCAG 2.1 principle is a list of guidelines, and under each guideline are compliance standards, with techniques and failure examples at each level. Some guidelines include only Level A items; others include items for multiple levels of conformance, building from A to AAA. At each stage, you can easily see what more you would need to do to reach Level AA or AAA. In this way, many websites include elements at multiple levels of accessibility.

MAGENTA is a web-based accessibility tool developed by the Human Interface in Information Systems (HIIS) Laboratory within the Human Computer Interaction Group. In addition to the WCAG 1.0 guidelines it evaluates the accessibility of websites according to their conformance to guidelines for the visually impaired and guidelines included in the Stanca Act.
In recent cases, the U.S. Department of Justice has repeatedly sided with plaintiffs arguing that a private company’s website needs to be accessible, despite any other mitigating factors. One thing is for certain, however: The number of federal lawsuits alleging violations of the ADA is currently accelerating at a rapid pace. Between January and August 2017, there were 432 ADA lawsuits filed in federal court—more than the total number of ADA lawsuits in 2015 and 2016 combined.
The statement that “noncompliance with a voluntary technical standard for website accessibility does not necessarily indicate noncompliance with the ADA” is new and significant.  It is a recognition that a website may be accessible and usable by the blind without being fully compliant with the privately developed Web Content Accessibility Guidelines (WCAG) 2.0 or 2.1.  The statement confirms what some courts have said so far:  That the operative legal question in a website accessibility lawsuit is not whether the website conforms with WCAG, but whether persons with disabilities are able to access to a public accommodation’s goods, services, and benefits through the website, or some alternative fashion.
Tenon assists by creating reports of evaluation results and automatically checks single web pages, groups of web pages or web sites, as well as password protected or restricted pages. Report formats are HTML, XML, CSV, and JSON. The authoring tools involved are Adobe Dreamweaver, Microsoft Visual Studio, and Sublime Text. Tenon is an online service, being an online checker, hosted service and server installation. Licenses are commercial or enterprise, but you can also test the program through a trial or demo version.
President George H.W. Bush signed the Americans with Disabilities Act into law July 26, 1990. The ADA prohibits discrimination of people with disabilities and guarantees the same opportunities as everyone else. These opportunities include employment possibilities, purchasing of goods and services and the ability to participate in State and local government programs.
People with disabilities that affect their sight, hearing, or mobility may have difficulty accessing certain parts of websites and other online properties unless certain accommodations are made. Just as businesses may need to make adjustments to their physical location so that disabled customers have easy access to the premises, companies may need to adjust certain aspects of their websites so individuals with disabilities can take full advantage of all the features and services.
HTML tags – specific instructions understood by a web browser or screen reader. One type of HTML tag, called an “alt” tag (short for “alternative text”), is used to provide brief text descriptions of images that screen readers can understand and speak. Another type of HTML tag, called a “longdesc” tag (short for “long description”), is used to provide long text descriptions that can be spoken by screen readers.
Legal precedent is changing, and ADA compliance related lawsuits are becoming more successful, and the courts are seeing more of them as a result. Title III of the Americans with Disabilities Act pertains to private sector businesses. Lately, those protections are more frequently expanding into digital territory as web and mobile applications become more necessary in our day-to-day lives.

Another useful tool for ADA website compliance is an automated ADA Website Compliance Checker. This is a software program that automatically checks whether certain conditions are met. A program used for testing ADA compliance might check whether all images do indeed have alt text, or whether the color contrast between the text and the background meets a certain minimum level. Some programs check multiple conditions at once, while others are designed to check just one accessibility feature. Some check whether they meet specific technical or legislated requirements, such as the requirements of Section 508 of the Rehabilitation Act.
If posted on an accessible website, tax forms need to be available to people with disabilities in an accessible format on the same terms that they are available to other members of the public – 24 hours a day, seven days a week, without cost, inconvenience, or delay. A staffed telephone line that sent copies of tax forms to callers through the mail would not provide equal access to people with disabilities because of the delay involved in mailing the forms.
Distinguishable: To assist color-blind users and those with other visual impairments, color is never used as the sole means of conveying information or prompting the user. Audio lasting more than 3 seconds can be paused, or the volume can be controlled independently of the system volume. Regular text has a contrast ratio of at least 4.5:1, and large text has a contrast ratio of at least 3:1. In addition, text can be resized up to 200 percent without causing issues with the website.
Signed in 1990 at a time that most people hadn’t even used the Internet, the Americans with Disabilities Act does not explicitly regulate how websites need to follow nondiscrimination requirements. We now know that using the Internet is one of the most important ways for people with disabilities to fulfill their needs and desires. For many people with disabilities, especially impairments to sight and motion, visiting a store or other physical location can be a challenging experience. Online shopping, for example, allows people with disabilities to make the purchases they need easily and securely within the comfort of their own homes.
Furthermore, website compliance checkers cannot possibly identify every single barrier on a website that is in violation of the ADA. Some accessibility problems can only be found with thorough manual testing. Others can only be discovered through functional testing – people who have disabilities and/or use assistive technologies such as screen readers that systematically try out core website functions, such as filling out forms. If these kinds of testing aren’t carried out, it is likely that very significant barriers could go unnoticed, and the website would still not be compliant with the ADA.
As I mentioned above, under each WCAG 2.1 principle is a list of guidelines, and under each guideline are compliance standards, with techniques and failure examples at each level. Some guidelines include only Level A items; others include items for multiple levels of conformance, building from A to AAA. At each stage, you can easily see what more you would need to do to reach Level AA or AAA. In this way, many websites include elements at multiple levels of accessibility.
Tools do exist that assist website developers in making their sites more accessible for those with disabilities. Browsers are also key in web accessibility. The challenge is designing a site and software that meets different users’ needs, preferences and situations. Web accessibility also can benefit those without disabilities, specifically those with a temporary disability such as a broken arm, aging, and slow Internet connections. The accessibility testing tool you should use depends on your site’s needs and budget among many other factors.
Website barriers weren’t on anyone’s radar when the ADA came into force in 1990. At that time, the Internet wasn’t an integral part of our day-to-day lives. Since then, however, the Department of Justice (DOJ) has made it clear that websites are nevertheless covered by this law. For instance, it has written: “Increasingly, private entities of all types are providing goods and services to the public through websites that operate as places of public accommodation under title III of the ADA. Many websites of public accommodations, however, render use by individuals with disabilities difficult or impossible due to barriers posed by websites designed without accessible features.”4

For most people, the Americans with Disabilities Act (ADA) conjures up pictures of physical accommodations such as wheelchair ramps near building entrances, handicapped parking spaces, and the use of braille writing on signs and placards. These measures have been tremendously valuable in helping the 56.7 million Americans with a disability function and thrive within society.
It is worth noting that before the settlement, Netflix attempted to argue that, due to its role as a streaming video distributor, any legal action should pertain to the 21st Century Communications and Video Accessibility Act (CVAA), which, at the time, did not call for closed captions on content that had not previously aired on US television. However, the court ruled that these two laws are not mutually exclusive and that Netflix was not protected from ADA prosecution because of compliance with the CVAA.
Thanks for writing. While I’m not a lawyer I believe if your physical practice is ADA exempt your web presence, as an extension of that physical business would maintain the same exemption status. If you’d like to be absolutely certain I’d confer with an ADA lawyer (email us, questions at yokoco dot com if you need a referral) but I don’t believe you have reason to worry.
AATT (Automated Accessibility Testing Tool) is a product offered by PayPal. This platform provides an accessibility API as well as other custom web applications for HTML CodeSniffer. Version 1.0.0 was released in April 2015. The program assists by creating reports of evaluation results. It automatically checks single web pages, as well as groups of web pages or sites. This includes password protected or restricted pages. AATT includes HTMLCodeSniffer with both PhantomJS and Express, which runs on Node. The license is Open Source and supported formats include HTML and Images.
Bookmarklets for Accessibility Testing, by Paul J. Adam, uses JavaScript to highlight roles, states, and properties of web accessibility elements on web pages. These are accessible to the screen reader users on any browser, including those on mobile phones. The most recent version 2.0 was released on July 1, 2015, and it covers guidelines including WCAG 2.0 — W3C Web Content Accessibility Guidelines 2.0, Section 508, and U.S. federal procurement standards.

The Americans with Disabilities Act (ADA) and, if the government entities receive federal funding, the Rehabilitation Act of 1973 generally require that state and local governments provide qualified individuals with disabilities equal access to their programs, services, or activities unless doing so would fundamentally alter the nature of their programs, services, or activities or would impose an undue burden.2 One way to help meet these requirements is to ensure that government websites have accessible features for people with disabilities, using the simple steps described in this document. An agency with an inaccessible website may also meet its legal obligations by providing an alternative accessible way for citizens to use the programs or services, such as a staffed telephone information line. These alternatives, however, are unlikely to provide an equal degree of access in terms of hours of operation and the range of options and programs available.