Introduction
Accessibility testing tools help you find the barriers that stop people with disabilities from using your website or app, like missing image descriptions, low color contrast, or buttons you can’t reach with a keyboard. Some tools scan pages automatically, some guide you through manual checks, and some, like screen readers, let you use your product the way many people actually do. This guide covers the best web accessibility testing tools, the free accessibility testing tools worth installing today, and the mobile accessibility testing tools you need for Android and iOS apps.
What Is Accessibility Testing
Accessibility testing checks whether people with disabilities can use your website or app without running into barriers. That includes people who are blind or have low vision, people who are deaf or hard of hearing, people who rely on a keyboard or switch device instead of a mouse, and people with cognitive disabilities. Most teams test against the Web Content Accessibility Guidelines (WCAG). WCAG breaks accessibility down into testable rules called success criteria, grouped into three levels: A, AA, and AAA. Level AA is the target most teams aim for.
3 Ways to Test for Accessibility
No single accessibility testing method catches everything. Most teams use a mix of automated scans and manual checks.
Automated Accessibility Testing
Automated accessibility testing tools scan your code or rendered page and flag issues that break clear, rule-based checks. They’re fast, repeatable, and easy to run on every build.
They’re good at catching:
- Missing alt text on images
- Form fields without labels
- Low color contrast
- Empty links and buttons
- Invalid or misused ARIA attributes
The limit with test automation is judgment. A tool can tell that an image has alt text, but not whether that text actually describes the image. It can't tell you whether your checkout flow makes sense to someone using a screen reader. Experts generally agree that automated tools catch only a portion of WCAG issues, so a clean scan is a starting point, not proof of compliance.
Manual Accessibility Testing
Manual testing refers to a person working through the product and checking what automation cannot, such as navigating every page with only the keyboard (Tab, Shift+Tab, Enter, Space, and arrow keys), using a screen reader to complete key tasks, like signing up or checking out, and zooming text to 200% and checking that nothing breaks or gets cut off. Manual accessibility testing also includes checking that focus moves in a logical order and is always visible, and reviewing whether link text, headings, and error messages make sense on their own
Manual testing takes longer and depends on the tester’s experience, but it’s the only way to confirm a product is actually usable, not just technically correct.
Hybrid Testing
Hybrid testing refers to a mix of both manual and automated testing. Automated tools handle the repetitive, rule-based checks on every build, and manual testing focuses on the areas that need human judgment.
In a practical hybrid setup, automation includes scans in your CI pipeline to catch regressions early and using browser extensions during development to fix issues before code review, whereas manual testing can include running keyboard and screen reader tests on key user flows before each release. Testers track every accessibility test case and result in one place so nothing slips through.
The Best Web Accessibility Testing Tools In 2026
The right accessibility testing tool depends on what you need: quick checks while you code, guided manual testing, automated checks in your pipeline, or monitoring across a large website. The five tools below cover all of these, and most teams end up using two or three together.
1. axe DevTools
axe DevTools is built on axe-core, an open-source accessibility rules engine that powers many other testing tools too. The browser extension works in Chrome, Edge, and Firefox. It lists each issue with its severity, highlights the affected element on the page, and explains how to fix it.
The free version runs automated tests on one page at a time. Paid plans add Intelligent Guided Tests, which walk you through manual checks step by step, along with user-flow testing, CI/CD integration, and team reporting. There are separate axe products for mobile app testing as well.
Best for: Development teams that want reliable automated testing in the browser and in their pipeline.
2. WAVE (WebAIM)
WAVE is one of the most widely used web accessibility testing tools. Instead of giving you a plain list, it places icons directly on your page to show errors, contrast errors, alerts, page structure, and ARIA usage, so you can see exactly where each issue sits.
You can run WAVE as a browser extension for Chrome, Firefox, and Edge, or paste a URL into its online checker. The extension runs entirely in your browser, which means it can check password-protected pages, internal sites, and dynamic content without sending any data out.
Best for: Visual, page-by-page reviews and teams that are new to accessibility.
3. Accessibility Insights (Microsoft)
Accessibility Insights for Web is a free, open-source extension for Chrome and Edge. It has two main modes:
- FastPass: A quick check that combines automated tests with a tab stops test to find common, high-impact issues in under five minutes.
- Assessment: A guided process that takes you through automated and manual tests to measure conformance with WCAG 2.2 Level AA.
You can save an assessment and pick it up later, which helps with larger audits. Microsoft also offers a version for testing Windows desktop apps.
Best for: Teams that want structured, guided manual testing without paying for a platform.
4. Pa11y
Pa11y is a free, open-source tool that runs automated accessibility tests from the command line or through Node.js. It uses HTML_CodeSniffer as its default test runner and can also run axe, or both together for wider coverage.
Its companion tool, Pa11y CI, tests a list of URLs or an entire sitemap in one go and can fail a build when new issues appear. That makes it a simple way to stop accessibility regressions from reaching production.
Best for: Developers who want lightweight, scriptable accessibility checks in CI.
5. Siteimprove
Siteimprove is a paid, cloud-based platform built for organizations that manage large websites. It scans your sites automatically, ranks pages by how much attention they need, and tracks accessibility progress over time on dashboards. It also covers broader quality checks like broken links and spelling, along with SEO.
CMS integrations let content teams catch accessibility issues before a page goes live. As a full platform, it's typically more expensive than single-purpose testing tools.
Best for: Large organizations that need ongoing accessibility monitoring across many pages and sites.
Free Accessibility Testing Tools Worth Knowing
You can try free accessibility testing tools to get started before moving towards a paid platform.
6. WAVE Browser Extension
The WAVE extension is free for Chrome, Firefox, and Edge. Click its icon, and it marks up the page you’re on, showing what’s wrong and what’s working well. Its Contrast tab lets you check color pairs and adjust them until they pass. Because it also highlights things done right, like properly labeled form fields, WAVE is a great learning tool for designers and testers who are new to accessibility.
7. axe DevTools Free (Chrome/Firefox Extension)
The free axe DevTools extension adds an axe DevTools tab to your browser’s developer tools. You can run a full-page scan, see issues sorted by severity, jump to the affected element, and read clear guidance on how to fix it. The free version only runs automated tests, one page at a time. For checking your own work during development, that's usually all you need.
8. Google Lighthouse
Lighthouse is built into Chrome DevTools. Its accessibility audit runs checks powered by axe-core and gives the page a score out of 100, where higher-impact issues count for more. Each check is pass or fail, with no partial credit. Lighthouse also lists items you need to check by hand, which don't affect the score. Keep in mind that a perfect score only means the page passed the automated checks, not that it's fully accessible.
9. IBM Equal Access Checker
The IBM Equal Access Accessibility Checker is a free, open-source extension for Chrome, Firefox, and Edge that adds a panel to your browser’s developer tools. It uses IBM’s own rule engine instead of axe-core, which makes it a useful second opinion alongside axe-based tools. Its keyboard checker mode maps out the tab order on the page and flags potential problems with focusable elements. For automated runs, the checker is also available as an npm package.
10. NVDA Screen Reader
NVDA is a free, open-source screen reader for Windows and one of the most widely used screen readers among blind and low-vision users. Testing with it shows you how real users hear and move through your site. Use it to check that headings, links, form labels, and error messages are read out clearly, and that you can complete key tasks without looking at the screen.
11. VoiceOver (Apple)
VoiceOver is the screen reader built into every Mac, iPhone, and iPad. On a Mac, turn it on with Command + F5. On iPhone or iPad, go to Settings > Accessibility > VoiceOver. VoiceOver is the easiest way to test how your site works in Safari and how your app behaves on iOS. Practice the basic gestures first, since VoiceOver changes how touch controls work once it's on.
Mobile Accessibility Testing Tools
Native mobile apps need their own tools. Android and iOS apps are built with platform-specific UI code, so you need tools that can read those platforms directly. The tools below cover automated scans, screen reader testing, and element inspection for both.
12. Accessibility Scanner (Google)
Accessibility Scanner is a free Android app from Google Play. Once you turn it on in your device’s accessibility settings, it adds a floating button. Open the app you want to test, tap the button, and it scans the screen.
It suggests fixes such as larger touch targets, better color contrast, and missing content descriptions, highlighted on a screenshot. You can scan a single screen or record a flow across several screens. No coding is needed, so testers and designers can use it too and share results with developers.
13. TalkBack (Android)
TalkBack is Android’s built-in screen reader. You’ll usually find it under Settings > Accessibility > TalkBack, though the exact path can vary by device maker. Once it’s on, you swipe to move between elements and listen to what each one announces.
Use TalkBack to check that every button and image has a clear label, that focus moves in a logical order, and that users never get stuck in a loop. It includes a built-in tutorial, which is worth going through before your first test.
14. Xcode Accessibility Inspector
Accessibility Inspector comes with Xcode. Open it from Xcode > Open Developer Tool > Accessibility Inspector, then point it at your app running in the Simulator or on a connected device to see each element's label, value, and traits.
Its Audit tab runs an automated check for common problems like missing labels and low contrast. Click any warning and the inspector highlights the matching element. You can also turn accessibility settings on and off while testing, and run similar audits automatically as part of your UI tests.
15. Android Studio Layout Inspector
Layout Inspector shows the UI structure of a running Android app, along with the details attached to each element. For accessibility, it helps you inspect each element’s semantics and spot missing or incorrect information, such as an image without a content description.
It works best alongside TalkBack. When TalkBack skips or misreads something, Layout Inspector helps you see why. Android Studio also shows lint warnings when images and image buttons are missing content labels.
16. Color Contrast Analyzer
The Colour Contrast Analyser (CCA) is a free desktop app for Windows and Mac. Use its eyedropper to pick text and background colors from anything on your screen, including an emulator, a simulator, or a design file, and it shows the contrast ratio with a clear pass or fail against WCAG. At Level AA, normal text needs a contrast ratio of at least 4.5:1, while large text and UI components need at least 3:1. CCA also includes a color blindness simulator, which helps designers check that color isn't the only way information is shown.
Manage Your Accessibility Testing Test Cases With TestFiesta
Finding accessibility issues is only half the job; you also need to track what has been tested, what failed, and what requires retesting. Managing these test cases across spreadsheets and documents quickly becomes inefficient.
TestFiesta centralizes accessibility test management alongside your existing QA workflows:
- Reusable Templates: Standardize test case creation with reusable accessibility templates.
- Universal Tagging: Categorize test cases by WCAG level, platform, or test type for quick filtering.
- Shared Steps: Reuse common testing instructions across multiple test cases.
- Test Case Tracking: Plan testing passes per release and track execution status in one dashboard.
- Integrated Bug Tracking: Convert failed test runs directly inside the platform or integrate seamlessly with Jira or GitHub with full context.
- AI Copilot: Automatically generate test cases from requirements, user stories, or design files.
- TacoTruck CLI: Sync automated CI/CD pipeline results alongside manual test results.
FAQs
Can automated accessibility testing tools guarantee WCAG compliance?
No, automated tools cannot guarantee WCAG compliance. They catch rule-based issues like missing labels, low contrast, and invalid ARIA, but they can’t judge issues where human judgment is critical, such as whether alt text is meaningful or if a flow makes sense to a screen reader user.
What’s the difference between WCAG 2.1 and WCAG 2.2?
WCAG 2.1 and 2.2 are different versions of Web Content Accessibility Guidelines (WCAG) published by the World Wide Web Consortium (W3C). WCAG 2.2 builds on 2.1 by adding nine new success criteria and removing one, 4.1.1 Parsing, which is now considered obsolete.
Do my accessibility testing tools need to support WCAG 2.2?
It’s recommended. Many legal requirements still point to WCAG 2.1 AA, but because 2.2 is backward compatible, testing against 2.2 covers both versions.
Do I need different tools for mobile and website accessibility testing?
You need different tools for mobile and web accessibility testing if you are testing a native app. Web tools scan HTML in a browser, while Android and iOS apps need platform tools like Accessibility Scanner, Xcode’s Accessibility Inspector, TalkBack, and VoiceOver. For mobile websites, your web tools still work, but test on real devices with a screen reader turned on, too.





