web accessibility

10 Document and Web Accessibility Checkers to Get You Started

Document and Web Accessibility Checkers & Tools For Beginners to Experts

Building web accessibility, documents, videos, and course materials is no easy task. Luckily, there are a variety of accessibility checkers and tools to help you stay on track.

Most of these accessibility checkers are free to use and solve a variety of accessibility issues. Some are for specific items such as websites or documents (PDFs), some are specifically for developers, and others are more general WCAG 2.0 and Section 508 checkers that anyone can use.

It is important to note that while these checkers are very useful, you should still have people with disabilities test your content determine the true level of accessibility.

To get a full breakdown of the FCC closed captioning requirements, visit this link.


Web Accessibility Checker
WAVE Accessibility Checker

WAVE is a free tool made by WebAIM (Web Accessibility In Mind) to help developers make their web content more accessible. WAVE presents your page with embedded icons and indicators. Each icon, box, and piece of information added by WAVE presents some information about the level of web accessibility of your page.

While WAVE is most effective when used by someone knowledgeable about web accessibility, people who are not web accessibility experts can also benefit from WAVE.

Access the tool here.
Download the Chrome extension here.

2. AChecker

AChecker is used to evaluate HTML content for web accessibility problems by entering the location of a web page, uploading an HTML file, or by pasting the complete HTML source code from a Web page.

AChecker produces a report of all web accessibility problems for your selected guidelines. It identifies 3 types of problems:

  • Known problems: These are problems that have been identified with certainty as accessibility barriers. You must modify your page to fix these problems;
  • Likely problems: These are problems that have been identified as probable barriers, but require a human to make a decision. You will likely need to modify your page to fix these problems;
  • Potential problems: These are problems that AChecker cannot identify, that require a human decision. You may have to modify your page for these problems, but in many cases, you will just need to confirm that the problem described is not present.

Access AChecker here.

 3. SortSite Accessibility Checker and Validator

SortSite checks sites against W3C  WCAG accessibility standards and compliance with Section 508 of the Rehabilitation Act. SortSite can read HTML, CSS, JavaScript, PDF, GIF, and Flash.

Checks include:

  • WCAG 2.0 – 118 tests covering A, AA and AAA guidelines
  • WCAG 1.0 – 86 tests covering A, AA and AAA guidelines
  • Section 508 – 55 tests covering 15 guidelines

Check the first 10 pages of a website for free here.
See plans and pricing here.

4. UDOIT: Universal Design Online Inspection Tool

UDOIT logo. web Accessibility Checkers
10 Accessibility Checkers

UDOIT (pronounced, “You Do It”) enables faculty to identify web accessibility issues in Webcourses@UCF. It will scan a course, generate a report, and provide resources on how to address common web accessibility issues.

While UDOIT was developed for faculty at UCF, the source code is available to the public under the GPL V3 open source license. You can download the source code at UDOIT’s GitHub page. This means UDOIT is free for use not only at UCF but also at any institution that uses Canvas by Instructure.

5. Document Accessibility Toolbar (DAT)

DAT is a dedicated accessibility ribbon menu for Microsoft Word that makes it quicker and easier to create accessible documents. It is free to download and features a range of hand-picked and custom-built functions to optimize and validate a document for accessibility.

Download a Single User License here.
Download a Multi-User Licence here.

6. CommonLook PDF Accessibility Software

CommonLook offers a variety of accessibility checkers and programs for developers, authors, and testers to use.

Tools include:

  • CommonLook PDF Validator: completely tests a document against Section 508, WCAG 2.0 AA, PDF/UA, and HHS (U.S. Health and Human Services) standards. Download for free here.
  • CommonLook Office GlobalAccess makes it easy to create accessible PDF documents directly from Microsoft Word and PowerPoint. Learn more here. Request Trial here.
  • CommonLook PDF GlobalAccess is ideal for businesses, educational institutions, government agencies, and other enterprises and individuals that need to ensure their PDF files are accessible and conform to compliance standards such as WCAG and Section 508. Learn more here. Request more info here.
  • CommonLook Clarity GlobalAccess provides a comprehensive enterprise-wide solution for monitoring compliance with accessibility standards. Learn more here.
  • CommonLook Dynamic gives enterprise organizations a customizable solution for ensuring that dynamically generated documents are accessible and meet compliance requirements. Learn more here.

7. Accessibility Color Wheel

The Web Accessibility Color Wheel is a free online tool that helps you choose a color pair (text & background) to use on a web page. It simulates three kinds of color blindness and it shows the result of W3C algorithms that reveal if the colors are accessible.

Access the tool here.

web accessibility
W3C’s WCAG 2.0 are the international standard for web accessibility

8. Tenon

Tenon.io offers a free online web accessibility checker, a Google Chrome extension, and a comprehensive API that can be integrated with your existing toolset. Tenon identifies 508 and WCAG 2.0 issues in any environment and helps you correct them.

Access the free online checker here.
Download the Tenon Check Chrome extension here.
Start a free trial here to use the Tenon API.

9. Automated Web Accessibility Testing Tool (AATT)

AATT is an open source web accessibility checker that tests web applications for WCAG 2.0 conformance. AATT provides an accessibility API and custom web application for the HTML CodeSniffer, Axe and Chrome developer tools. Using the AATT web application, you can configure test server configurations inside the firewall, and test individual pages.

AATT includes with Express and PhantomJS, which runs on Node.

For node applications, it can be integrated into NemoJS testing framework to run accessibility testing during automated unit testing. For Nemo framework use [Nemo-Accessibility plugin] (https://github.com/paypal/nemo-accessibility)

Read the setup instruction here.

10. DYNO Mapper

DYNO Mapper is a visual sitemap generator that offers web accessibility checker and testing. It will evaluate a website’s HTML content for existing accessibility problems by testing against published guidelines. The web accessibility tool displays known, likely, and potential problems by page. Review each page’s web accessibility issues to isolate and resolve to provide persons with disabilities a great user experience.

See plans and pricing here.

Accessibility Matters

2018 - 2019 State and Federal Accessibility Guidelines
Download: The Updated 2019 State & Federal Accessibility Guidelines. 

No matter what industry you are in, these tools will help you ensure you are meeting accessibility requirements and guidelines. A well-executed University Video Strategy enables all universities to maximize video investments, student performance, and online video libraries.

By now, every university is using video in some way, whether for online learning, flipped classrooms, campus tours, etc. To stay current and maximize video investments, universities need to establish a university video strategy that allows videos to be stored, searched, viewed, and shared by students and faculty. To gain more information about rolling out a campus-wide video accessibility strategy, visit this link.

For information on who these laws apply to, check out our ebook:

Audio and Video Captioning and Transcription Solutions for the deaf and hard of hearing

cielo24 proudly works with companies and organizations across the globe on video data solutions that meet state, federal and international requirements for digital content accessibility. For more information on our video captioning and video intelligence solutions, you can contact us online or call us at 1-855-243-5624.

cielo24’s new Self Serve app is easy to use and extremely cost-effective. Within minutes a video can be uploaded to your account and you will receive a free machine-based, searchable transcript with keywords.

 Take a Video Captioning test-drive >>

Nicole E. Flynn, CMO at cielo24, is deeply interested in exploring and communicating the ways in which Artificial Intelligence (AI) intersects with various aspects of our daily lives. She is passionate about exploring the ways in which AI can be ethically harnessed to improve the quality of life and make our world a better place. Nicole seeks to educate and inform audiences about the potential of AI technology and how it can be used to drive innovation and growth.