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What Are Some of the Best Web Accessibility Testing Tools to Evaluate Your Website With? Top 5 Chrome Extensions

What Are Some of the Best Web Accessibility Testing Tools to Evaluate Your Website With? Top 5 Chrome Extensions

by Adriana Cacoveanu on Feb 29 2020

You've gone through the guidelines, standards, warnings, and best practices included in the W3C recommendations and... you're stuck. How do you know whether your website is 100% WCAG 2.1 compliant? What are the best web accessibility testing tools out there that you could use? 

Free, easy to use accessibility evaluation tools that you could run on your website to spot the issues lurking in there. 

And which could even get you some valuable recommendations on the best ways to address them. 

All that before you actually have someone (or even a whole team of QA testers) review your website. Before you carry out an in-depth accessibility audit and run user-centric testing sessions with... real people involved. 

You must be thinking about browser extensions... 

They're so accessible: you just open the page you want to check and click a button in your toolbar. They're free and make great "starts" for identifying accessibility issues on your website. And for getting your hands on some valuable recommendations on how to fix them. 

So, here are 5 automated accessibility testing tools that we recommend you try first: 

 

0.1. But What Are Accessibility Tools More Precisely? 

"Are there any recommended tools available that can help me test for accessibility issues?"

Take these common accessibility issues that might still go "undetected" on your website: 

 

  • there's not enough color contrast on certain pages (or no contrast at all)
  • one or more images don't have ALT descriptions added to
  • an editor deleted the content for one of the H2 tags but left that tag lingering in there and confusing the screen readers
  • someone from your design team has put a placeholder text instead of a text field, which risks displaying an unlabeled field, that screen readers cannot... read
  • there's one label missing from your newsletter sign-up form 

     

These are all frequent issues that web accessibility evaluation tools can help you detect and address. 

They fall into multiple categories: 

 

  • browser extensions, that we'll be focusing on in this post
  • command-line tools accessibility testing tools that you can integrate with your continuous integration system 

     

Tip: Keep in mind that the following 5 best web accessibility testing tools detect about 30% of the issues. They make a great starting point for a more complex audit and comprehensive monitoring strategy that you should set in place. 

 

1. Wave, The Venerated Web Accessibility Evaluation Tool for Chrome 

A full-featured, easy to use website accessibility checker that's been in most developers' toolkits for quite a few years now. 

5 Best Web Accessbility Testing Tools: Chrome Extensions- Wave

Here's how it works: 

 

  • it adds a visual overlay of error icons and indications to the web page that you're auditing
  • icons which, once clicked, provide you with information and recommendations about the accessibility issues detected: redundant titles, structural elements, links to HTML, poor color contrast, how those issues impact different types of users, what WCAG guidelines they violate, etc.
  • it points out to you the "troublesome" code via annotated HTML popping up in the panel at the bottom of the screen 

     

In short, Wave is one of the robust website accessibility checkers that goes beyond streamlining your audit process.

It's also geared at educating users (website owners, QA testers) about the accessibility issues to pay attention to. 

"How to use Wave accessibility tool?" 

Either way:

 

  • you can just enter your URL in the dedicated field on their website
  • you can download the browser extension 

     

Go for the extension particularly if it's dynamic, password-protected and locally stored web pages that you need to check. 

 

2. Tenon, Accessibility as a Service 

"How do I test accessibility?" 

Tenon's another tool that comes both in a free and paid version. 

5 Best Web Accessbility Testing Tools: Chrome Extensions- Tenon

What makes it "worthy" of this top 5 selection?

 

  • it addresses the common scenario: running accessibility tests after neglected guidelines have already turned into critical issues that affect the user experience 
  • it's such a flexible tool for content creators, designers, developers, and testers
  • it generates... generous reports with code snippets for each error, corresponding WCAG guidelines, and recommendations on how to fix them 

5 Best Web Accessbility Testing Tools: Chrome Extensions- Tenon accessibility report

In short: Tenon helps you run a preventive type of accessibility check on your website. You can detect key issues before they even get to turn into major usability problems 

Furthermore, you can easily incorporate Tenon into your toolset via its API. It integrates smoothly with any CMS, IDE, deploy tool or automated build that you might be using.

 

3. Google Lighthouse, One of the Top Automated Accessibility Testing Tools  

"How do I know if my website actually is WCAG 2.0 compliant?" 

5 Best Web Accessbility Testing Tools: Chrome Extensions- Google Lighthouse

You give it a full check using a tool like Google Lighthouse here: 

 

  • it's open-source
  • it's automated
  • it's so handy (it's Chrome built-in)
  • it's super easy to use 

Moreover, this accessibility testing tool is part of a whole suite of checks that you can run using Chrome Developer Tools: 

  • SEO
  • Progressive Web App
  • Performance
  • Best Practices 

What it does it provide you with a full report of its test results: 

 

  • whether all the buttons on that page have accessible names or not
  • whether all the images have ALT attributes added to
  • whether that page has a title or not ... 

     

Next, you simply take it from there and improve the areas signaled in the report. 

And here's how you use it: 

 

  • open devtools in your Chrome Browser
  • look for the "Audits" tab
  • click "Perform an Audit"

Tip: save the report in a JSON format for later (or to send it to someone in your team). 

Another great thing about Google Lighthouse is that it's one of those web accessibility evaluation tools that don't require you to sign up. You just drag a report onto the online report viewer that it provides you with. 

 

4. Axe Browser Extension 

"How do you know if your site actually is WCAG 2.0 compliant?" 

5 Best Web Accessbility Testing Tools: Chrome Extensions- Axe

You "grab" a tool like Axe here and give your site an automated audit. 

It'll just attach itself as a new tab to your Chrome's Dev Tools. Once you click that blue "analyze" button, you'll be given a whole list of "violations" detected on your page. 

Why have we included it in our highly exclusive list of 5 best web accessibility testing tools? 

 

  • because it's free (a self-contained open-source library)
  • because you get to custom-tune it to your specific accessibility testing needs: add specific rules, integrate it with testing frameworks and browsers of your choice...
  • because each signaled issue "exposes" the corresponding markup, as well

     

Just hit "Inspect code" and you're taken to the tab in DevTools, where the "culprit element" is outlined.

Tip: another reason why this is one of the first website accessibility checkers that you should consider is that the Axe accessibility report goes beyond signaling clear violations of accessibility guidelines.

It also highlights aspects that you could improve on your website's UI.

 

5. Siteimprove, One of the Best Web Accessibility Testing Tools

5 Best Web Accessbility Testing Tools: Chrome Extensions- Siteimprove

We confess: Siteimprove is our favorite website accessibility checker. Here's why: 

 

  • it provides us with actionable information regarding all the issues that it detects
  • it generates clear explanations on the impact of those issues on some users
  • it also "spoils" us with intuitive user experience: issues get highlighted to the right side of the page 

     

Where do you add that the entire web page audit process is performed in our Chrome browsers. 

Easy to use and highly efficient. What more could you wish from a free accessibility testing tool? 

 

Final Word 

Turn this type of accessibility testing — using Chrome extensions — into a part of a more comprehensive testing strategy. 

You shouldn't limit your evaluation to the results that you get by using any of these 5 best web accessibility testing tools. 

There's still some level of "human intervention" needed to interpret those results. To come up with the proper set of steps to take, right? 

Use them if you just want to check whether: 

 

  • there are any images without ALT descriptions on your website
  • the HTML is valid
  • your form fields have both labels and descriptions 

     

Whereas for assessing: 

 

  • whether that HTML is semantic or not
  • whether those form field descriptions are user-friendly enough
  • whether there's a proper heading hierarchy on a given page on your website

     

... you'll need human analysis. 

Automated accessibility testing will (only) point out key aspects for your QA testers to focus on. 

 

The END

Have you used any of these accessibility testing tools on your website? 

Do you usually stop your audit there or do you use an automated & manual testing type of "combo"? Does it depend on the context actually? 

Share your thoughts in the comments down below! 

Photo by John Schnobrich on Unsplash 

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