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web accessibility testing tools

11 Web Accessibility Testing Tools For SEO To Know About

Without a doubt, website accessibility is a critical aspect not only for SEO results but for your users, too. Incorporating web accessibility testing tools is essential for ensuring that your website meets the needs of all users, including those with disabilities. 

Join seobase as we explore the importance of web accessibility for SEO and introduce you to the top 11 web accessibility testing tools to help you enhance your website's accessibility and SEO rankings.



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What is Web Accessibility?

Web accessibility refers to the practice of designing and developing websites and web applications that can be used effectively by people with disabilities. 

This includes individuals with visual, auditory, motor, or cognitive impairments. The goal is to provide all users equal access to information and functionality, regardless of their abilities or devices.

To check if your website is accessible, it's essential to have a range of web accessibility testing tools to provide you with accessibility reports.

Read: Accessible Websites And How They Impact SEO

Why is Web Accessibility Important for SEO?

Search engines, like Google, place a high value on user experience when determining search rankings. A website accessible to all users tends to provide a better user experience, which can positively impact SEO. 

Therefore, web accessibility is not just about complying with legal standards but also contributes to higher search engine rankings.

That's why we have various web accessibility testing tools to align our SEO strategies with accessible tactics so that all users will fully engage with our content. 

Read: Why are SEO and content marketing inseparable?

best accessibility testing tools

Web Accessibility Standards to Know About

Web accessibility standards ensure that websites and web applications are inclusive and usable by people with disabilities. 

Now that we have covered all the basics let's look at best practices for accessibility and explore the 11 best web accessibility testing tools that will make improving the website much more effortless. 

Best Practices for Web Accessibility

Before we delve into the 11 best web accessibility testing tools, let's go over some best practices for improving web accessibility:

  • Semantic HTML: Use proper HTML elements to structure your content. Semantic HTML helps screen readers and search engines understand the content's context.

  • Alternative Text for Images: Provide descriptive alt text for images. This helps users with visual impairments understand the content of images.

  • Keyboard Accessibility: Ensure a keyboard can navigate and activate all interactive elements. Some users rely on keyboard navigation.

  • Contrast Ratio: Maintain a sufficient contrast ratio between text and background colors to make content readable for low-visioners.

  • Descriptive Links: Use clear and descriptive link text. Avoid generic phrases like "click here" or "read more."

  • Video and Audio Accessibility: Provide captions for videos and transcripts for audio content to accommodate users with hearing impairments.

  • Form Accessibility: Ensure that forms are accessible and include proper field labels. Users with disabilities should be able to complete forms efficiently.

Read: SEO Checkpoints Best Practices Guide 2024

11 Best Web Accessibility Testing Tools

Now, let's explore the top 11 web accessibility testing tools in greater detail, along with their key features:


Wave is one of the comprehensive web accessibility testing tools that cater to both online and browser extension needs. It is a reliable solution for evaluating web pages against the Web Content Accessibility Guidelines (WCAG) and Section 508 standards. 


Key Features:

  • Online and Extension Options: Wave offers the flexibility of using it as an online tool or a browser extension, accommodating different testing preferences.

  • WCAG Compliance: It checks web pages for adherence to WCAG standards, ensuring a wide range of accessibility requirements are met.

  • Color-Coded Indicators: Wave provides color-coded indicators in its reports, facilitating quick identification and prioritization of accessibility issues for efficient resolution.


Pa11y is one of the versatile web accessibility testing tools available as a free, open-source solution. Its adaptability makes it suitable for conducting accessibility testing on individual web pages or automating the process for entire websites, enhancing the SEO experience.


Key Features:

  • Command-line and Web Interface: Pa11y offers the flexibility of using it through a command-line interface for advanced users or a user-friendly web interface for convenience.

  • Individual and Automated Testing: Users can test single web pages or automate testing for entire websites, accommodating various testing scenarios.

  • Open-Source: As an open-source tool, Pa11y is accessible to a broad audience, allowing developers and SEO professionals to collaborate and improve web accessibility.


Siteimprove is one of the best comprehensive web accessibility testing tools that offers a wide array of features. Siteimprove's all-in-one approach simplifies addressing accessibility alongside other SEO factors.

Key Features:

  • Accessibility, Quality Assurance, and Content Optimization: Siteimprove offers a holistic solution encompassing accessibility testing, quality assurance, and content optimization in one platform.

  • Comprehensive Analysis: It provides detailed reports and insights, facilitating a thorough understanding of website performance and areas needing improvement.

  • Ideal for SEO Professionals: Siteimprove's combination of accessibility and SEO features makes it an excellent choice for professionals looking to enhance both aspects simultaneously.


AChecker is one of the best free web accessibility testing tools to evaluate single web pages or entire websites. It supports multiple accessibility standards and offers user-friendly reports, aiding SEO experts in identifying and rectifying accessibility issues efficiently.

Key Features:

  • Multiple Accessibility Standards: AChecker supports various accessibility standards, ensuring comprehensive evaluation and compliance with WCAG.

  • User-Friendly Reports: Its easy-to-understand reports simplify identifying and addressing accessibility issues, benefiting search engine rankings.

  • Versatile Testing: AChecker caters to both single-page testing and website-wide evaluations, accommodating different testing requirements.


SortSite, developed by PowerMapper, is one of the best web accessibility testing tools that provides comprehensive site analysis. Beyond identifying accessibility issues, it offers recommendations for improving SEO.

Key Features:

  • Accessibility and SEO Analysis: SortSite combines accessibility testing with SEO analysis, allowing users to address both accessibility and search engine optimization concerns simultaneously.

  • Detailed Recommendations: It provides actionable recommendations for resolving accessibility and SEO issues and enhancing website performance.

  • Time-Efficient Solution: SortSite's all-in-one approach streamlines the process of addressing multiple aspects of website optimization, saving time and effort.

free website accessibility checker

W3C Markup Validation Service

While not one of the dedicated web accessibility testing tools, the W3C Markup Validation Service is a valuable resource for SEO professionals. It identifies HTML and markup errors that can impact web accessibility and SEO, emphasizing the importance of clean and valid code.


Key Features:

  • Complementary Resource: While not a dedicated accessibility tool, it complements web accessibility efforts by ensuring the foundational code is error-free and optimized.

  • SEO Improvement: By addressing markup errors, websites can enhance their SEO performance, aligning with best practices for search engine optimization.

JAWS (Job Access With Speech)

JAWS is a widely used screen reader software explicitly designed for individuals with visual impairments. It reads aloud the content on a computer screen, enabling users to access web content through synthesized speech or Braille displays.

While not necessarily one of the web accessibility testing tools, JAWS still provides good information about how you can improve your website. 

Key Features:

  • User Experience (UX) Evaluation: JAWS offers insights into web content accessibility from a user's perspective. Testers navigate the site, uncover potential issues, and gauge the user experience.

  • Accurate User Simulation: JAWS enables testers to mimic real users with visual impairments, gaining firsthand insights into accessibility challenges beyond automated testing.

  • Content Validation: JAWS validates image alt text, logical reading order, and keyboard navigation to ensure WCAG compliance.

Accessibility Checker

The Accessibility Checker by CKSource is one of the web accessibility testing tools designed to help developers and content creators identify and rectify accessibility issues directly within popular web content editors, such as CKEditor and CKEditor 5. It ensures that content generated in these editors is accessible to all users.

Key Features:

  • Editor Integration: Accessibility Checker seamlessly integrates into web content editors, allowing users to assess content accessibility while creating it.

  • Real-time Feedback: It provides real-time feedback on potential accessibility problems, guiding content creators to make necessary improvements.

  • Multiple WCAG Versions: Accessibility Checker supports various WCAG versions, enabling users to align content with specific accessibility standards.

DYNO Mapper

DYNO Mapper is one of the most versatile web accessibility testing tools offering a comprehensive suite of website planning, testing, and optimization features. It helps businesses and web professionals ensure their websites are accessible, user-friendly, and compliant with accessibility standards.

Key Features:

  • Site Mapping: DYNO Mapper allows users to create visual sitemaps, making planning and organizing website content easier.

  • Accessibility Scanning: The tool performs thorough accessibility scans, identifying issues related to WCAG compliance.

  • Content Inventory: Users can conduct content inventories to manage and optimize web content, ensuring accessibility is a priority.


Evinced is one of the most innovative web accessibility testing tools to enhance digital accessibility. It is dedicated to ensuring websites are user-friendly and inclusive, making the internet more accessible for all users.

Key Features:

  • Comprehensive Testing: Evinced offers thorough web accessibility testing, checking for various compliance standards, including WCAG.

  • AI-Powered Insights: The tool leverages artificial intelligence to provide actionable insights, making it easier to identify and resolve accessibility issues.

  • Real-Time Feedback: Evinced provides real-time feedback to users, allowing for immediate accessibility improvements during the development process.

LERA (Lightweight Evaluative Report for Accessibility)

LERA is one of the user-friendly web accessibility testing tools that simplifies the process of evaluating and improving digital accessibility. 

Key Features:

  • Effortless Scanning: LERA provides an intuitive and straightforward scanning process, making it accessible to technical and non-technical users.

  • Accessibility Reports: It generates detailed accessibility reports highlighting compliance with WCAG guidelines, helping users pinpoint specific issues.

  • Remediation Guidance: LERA offers clear remediation guidance and recommendations for addressing identified accessibility barriers.

accessibility tester


Incorporating web accessibility into your website's development process is not just about compliance; it's about creating an inclusive online environment. 

By implementing best practices and utilizing the 11 best web accessibility testing tools we've discussed, you can improve your website's accessibility, enhance user experience, and boost your SEO rankings.

Make your website accessible and improve your SEO strategy with seobase!


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