State and local governments will often post documents on their websites using Portable Document Format (PDF). But PDF documents, or those in other image based formats, are often not accessible to blind people who use screen readers and people with low vision who use text enlargement programs or different color and font settings to read computer displays.
However, full compliance with the ADA’s promise to provide an equal opportunity for individuals with disabilities to participate in and benefit from all aspects of the programs, services, and activities provided by State and local governments in today’s technologically advanced society will only occur if it is clear to public entities that their websites must be accessible.

Nice Article! It is very important to work under guidelines if you don’t want to get sued and don’t want to pay the penalties. But more importantly it is better to give each user hassle free user experience over your website. Being ADA Compliant means your website works well for people with disabilities and they can easily access and navigate your website.
Accessibility Checker is an open source accessibility evaluation tool that was developed in 2009 by the Inclusive Design Research Centre (formerly known as the Adaptive Technology Resource Centre) of the University of Toronto. Using this tool, the user can submit a web page via its URL or by uploading its HTML file and can subsequently select which guidelines to evaluate it against, namely the HTML Validator, BITV, Section 508 , Stanca Act, WCAG 1.0 and WCAG 2.0.
The World Wide Web Consortium (W3C) established the main international standards and accessibility for the World Wide Web. The WCAG is created by the W3C to provide a standard for web content accessibility that can be shared around the world. The WCAG is meant to accompany organizations as a sort of blueprint on how to make their websites ADA compliant.
WCAG 2.0 is not currently mentioned within the Americans with Disabilities Act itself (although that may change), but in decisions and agreements, the Department of Justice routinely holds up WCAG 2.0 Level AA as the technical requirements for digital accessibility that should be followed. Organizations are encouraged to refer to WCAG 2.0 Level A and AA when striving for ADA website compliance.
DYNO Mapper is a sitemap generator that checks the web accessibility of websites and online applications. DYNO Mapper includes content inventory and audit, as well as daily keyword tracking. Results are displayed within visual sitemaps to allow for easy and efficient project discovery and planning. Version 1.0 was released on December 1, 2014. Version 2.0 was released on May 22, 2018, and included a Visual Accessibility Tester that shows issues visually in your browser. Version 3.0 was released on March 12, 2019, with Authentication capability for testing private websites and online applications as well as monitoring and notifications. Guidelines covered include WCAG 2.1 — W3C Web Content Accessibility Guidelines 2.1, WCAG 2.0 — W3C Web Content Accessibility Guidelines 2.0, WCAG 1.0 W—3C Web Content Accessibility Guidelines 1.0, Section 508, U.S. federal procurement standards, Stanca Act, BITV, Italian accessibility legislation, and German government standards. The program assists by automatically checking groups of pages or sites, including those that are restricted or password protected, and generating reports of assessment results. Supported formats include CSS, HTML, and XHTML. Licenses are available for individuals, organizations, or enterprise.
In an August 2016 case involving the University of California Berkeley, the DOJ ruled that the public university was in violation of ADA Title II (similar to Title III but it instead applies to government organizations) because their YouTube channel’s videos didn’t include captions for hearing impaired visitors. The DOJ found this to violate the ADA as deaf users did not have equal access to the online content.
The DOJ is currently working to release new technical standards for digital accessibility. The latter updates to the ADA guidelines will be in conjunction with the latest version of WCAG 2.1, which includes the most widely accepted digital accessibility requirements across the globe. If organizations want to overcome the current limitations of ADA guidelines, then they should follow the WCAG 2.1 checklist,11 as well as the suggestions provided by the ADA. The latter two steps, combined with the help of a trusted digital accessibility compliance platform,12 can help organizations achieve digital accessibility best in class standards throughout all of their digital formats and across all media.

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.
People with disabilities are all around us. They live in every country and often experience life in a very different manner than those individuals who don’t have emotional, mental, or physical disabilities. In fact, 15 percent of the global population is classified as disabled. Of this 15 percent, an estimated 190 million people experience significant disabilities.¹

When the Americans with Disabilities Act became law in 1990, modern communications technologies such as the Internet were still in their infancy. The past few decades, however, have seen the rise of new channels such as websites and mobile applications, raising questions about the ADA’s original mission to make U.S. society more accessible to people with disabilities.