Must-have Chrome extensions for WCAG Testing

WCAG Chrome extensions help you catch accessibility issues while building a feature or reviewing someone else’s work. Keeping one open in your browser makes it easier to spot problems in the same workflow instead of discovering them weeks later during an audit.

They do not replace manual accessibility testing, and I would not rely on them as the only check. In this article, I cover some of the most popular Chrome extensions for identifying accessibility errors, along with tools that support testing on real devices.

What are WCAG Chrome Extensions?

WCAG Chrome extensions help you check how accessible a web page is without leaving your browser. They are useful for catching common issues early, so problems do not pile up and surface only during a formal audit.

Most extensions scan the current page against WCAG success criteria and highlight common accessibility problems. Some point out missing labels or contrast issues, while others let you inspect the accessibility tree or simulate how parts of the page are experienced by different users.

I usually reach for one when I need a quick accessibility check without inspecting the page manually or running a full audit. It gives me a clear starting point for issues worth investigating, although I still combine it with manual testing for a more complete assessment.

Must-Have WCAG Chrome Extensions

WCAG compliance is crucial for accessible web design. Here are some of the must-have Chrome extensions to ensure your site meets these requirements.

1. BrowserStack Accessibility Toolkit

This is the tool I reach for when I need more than a quick page scan. Instead of checking individual pages one by one, I can test complete user journeys, review accessibility issues across different browsers and devices, and keep everything in the same testing workflow.

I find it particularly useful once a project grows beyond a handful of pages because accessibility stops being a one-page problem.

Key Features:

• Workflow scanning: Tests complete user journeys instead of individual pages, helping you find accessibility issues that appear across multi-step flows.
• Real device testing: Checks accessibility on real browsers and devices, so you can verify that issues behave consistently across different environments.
• Guided manual testing: Walks you through accessibility checks that automated scanners can’t reliably detect.

2. WAVE

WAVE is usually one of the first extensions I open when reviewing a page. I like that it shows issues directly on top of the page instead of generating a separate report, which makes debugging much faster.

Key Features:

• Visual issue overlays: Highlights accessibility issues exactly where they appear on the page, making them easier to investigate.
• WCAG checks: Identifies common violations such as missing labels, incorrect heading structure, and accessibility errors.
• ARIA inspection: Displays ARIA roles and accessibility information without leaving the page.

3. Lighthouse

I already have Chrome DevTools open most of the day, so running Lighthouse is almost second nature. I wouldn’t use it as my only accessibility checker, but it’s an easy way to catch obvious issues before moving on to deeper testing.

Key Features:

• Accessibility score: Generates an overall score with recommendations for improvement.
• Built into Chrome: No installation or setup beyond Chrome DevTools.
• Combined audits: Runs accessibility, performance, SEO, and best-practice checks in a single report.

4. Siteimprove Accessibility Checker

I’ve used Siteimprove when I wanted more than a simple pass-or-fail result. The reports explain why an issue matters and point you towards a fix, which makes them easier to share with developers and content teams during reviews.

Key Features:

• Detailed WCAG reports: Explains accessibility violations with practical remediation guidance.
• Continuous monitoring: Tracks accessibility issues over time instead of relying on one-off scans.
• Developer-friendly recommendations: Includes code references to help resolve issues faster.

5. ORCA

I don’t use ORCA for every accessibility review, but it’s useful when I’m working closely with HTML and want to verify that the markup itself is accessible. It feels more like a developer utility than a general-purpose accessibility checker.

Key Features:

• HTML accessibility validation: Reviews elements such as forms, buttons, and images for accessibility issues.
• Real-time feedback: Highlights problems while you’re inspecting the page.
• Markup recommendations: Suggests improvements to create more accessible HTML.

6. Dyslexia Friendly

This extension gives you a different perspective on readability. I like using it when reviewing content-heavy pages because it quickly shows whether typography and colour choices make reading unnecessarily difficult.

Key Features:

• Readable fonts: Applies dyslexia-friendly fonts to improve readability.
• Custom colour settings: Lets you adjust text and background colours for better comfort.
• Reading preferences: Offers simple customisations based on individual needs.

7. High Contrast

Whenever I’m reviewing a new design system or colour palette, I usually spend a few minutes with High Contrast enabled. It’s one of the quickest ways to spot combinations that become difficult to read.

Key Features:

• Contrast modes: Applies different high-contrast colour schemes to the page.
• Customisable display: Lets you switch between multiple viewing modes.
• Quick visual validation: Helps evaluate how readable content remains under different contrast settings.

8. Color Enhancer

I’ve found Color Enhancer especially useful when reviewing UI changes. Instead of guessing how someone with colour vision deficiencies might experience a page, I can adjust the view and immediately see where colours stop communicating effectively.

Key Features:

• Colour vision simulation: Mimics different types of colour vision deficiencies.
• Adjustable filters: Lets you fine-tune colour perception settings.
• Colour accessibility testing: Helps identify colour combinations that may confuse users.

9. ChromeVox

Automated accessibility checks only go so far. Whenever I want to understand how a page actually behaves for screen reader users, ChromeVox gives me a much better picture than looking at audit results alone.

Key Features:

• Screen reader support: Reads page content aloud as users navigate.
• Keyboard navigation: Lets you test navigation without relying on a mouse.
• Accessibility verification: Helps identify issues affecting screen reader users.

10. Focus Indicator

Keyboard accessibility is easy to overlook until you start navigating without a mouse. I use this extension whenever I want to verify that focus remains visible throughout a page or application.

Key Features:

• Focus highlighting: Clearly marks the currently focused element.
• Custom focus styles: Lets you modify how focus indicators appear.
• Keyboard navigation testing: Makes it easier to review focus visibility across the interface.

Benefits of WCAG Chrome Extension Tools

You don’t need to run a full accessibility audit every time you change a page. Chrome extensions make it easy to check your work as you build, so accessibility becomes part of your normal development process instead of something you revisit before a release.

• Catch issues earlier: Most extensions scan the current page in seconds, making it easy to identify common accessibility problems before they make it into production.
• Validate changes as you work: After updating a form, navigation menu, or UI component, you can quickly rerun the extension to confirm the change hasn’t introduced new accessibility issues.
• See pages from different perspectives: Extensions that simulate colour vision deficiencies, keyboard navigation, or screen readers help you understand how different users experience your website.
• Understand what needs fixing: Many tools don’t just report an issue. They explain why it matters, point to the affected element, and often suggest how to resolve it.
• Build better accessibility habits: Running these checks regularly encourages developers, testers, and designers to think about accessibility throughout development rather than treating WCAG compliance as a final checklist.

Understanding WCAG Compliance

If you’ve worked on accessibility before, you’ve probably come across the term WCAG. Short for Web Content Accessibility Guidelines, it’s the internationally recognised standard for building websites that people with disabilities can use. The guidelines are published by the World Wide Web Consortium (W3C) and are used by organisations around the world as the benchmark for web accessibility.

WCAG is built around four core principles. Every accessibility requirement falls under one of these areas:

• Perceivable: Content should be presented in ways that users can see, hear, or otherwise perceive.
• Operable: Users should be able to navigate and interact with the interface using different input methods, including a keyboard.
• Understandable: Content and interactions should be clear, predictable, and easy to follow.
• Robust: Websites should work reliably with assistive technologies such as screen readers across different browsers and devices.

The guidelines are further divided into three conformance levels: A, AA, and AAA, with Level AA being the target most organisations aim for.

Following WCAG isn’t just about meeting a standard or checking a compliance box. It helps you build experiences that more people can actually use. It also reduces the risk of accessibility-related complaints or legal issues while making your website usable for a much broader audience.

That’s where WCAG Chrome extensions fit in. They won’t certify that your website is fully compliant, but they make it much easier to catch common accessibility issues while you’re developing or reviewing a page, long before a formal accessibility audit.

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Conclusion

No single extension can tell you whether your website is fully WCAG compliant. Each one solves a different problem. Some are great for visualising accessibility issues, others help with keyboard navigation, screen reader testing, colour contrast, or page structure. The right choice depends on what you’re trying to validate.

If you’re just getting started, install one or two extensions that fit naturally into your workflow and use them consistently. Combined with manual testing and testing on real browsers and devices, they’ll help you catch accessibility issues earlier and build experiences that work for more people.

Download Accessibility Toolkit Extension