Automated and Guided Accessibility Audits with Axe Pro

Web accessibility is no longer optional for organizations that want to reach all potential users and comply with legal requirements. Whether you are building a new website, maintaining an application, or auditing legacy systems, accessibility testing should be a fundamental part of your quality assurance process. Axe Pro represents one of the most comprehensive solutions available for conducting both automated and guided accessibility audits, combining the speed of automated testing with the thoroughness of manual expert evaluation.

This guide explores how axe Pro works, why it has become the foundation of accessibility testing strategies at organizations worldwide, and how you can leverage its capabilities to create truly inclusive digital experiences that serve every user effectively. Our web development services team specializes in building accessible websites from the ground up.

What is Axe Pro and Why It Matters

Axe Pro is an enterprise-grade accessibility testing platform developed by Deque Systems, built upon the open-source axe Core engine that powers many of the most widely-used accessibility testing tools in the industry. The platform extends the capabilities of basic automated testing by adding guided testing features, comprehensive reporting, and team collaboration tools that make accessibility auditing practical at scale.

The Foundation: Axe Core Engine

The axe Core engine serves as the foundation for axe Pro and is trusted by major organizations including Google, who uses it as the accessibility engine for Lighthouse. This open-source engine has been extensively tested and refined over years of development, with a focus on minimizing false positives while accurately identifying real accessibility barriers.

The engine checks for compliance with major accessibility standards including WCAG 2.1 levels A, AA, and AAA, Section 508 requirements, and the EN 301 549 standard used in Europe. It does this by analyzing the HTML structure, ARIA attributes, color contrast ratios, keyboard navigation patterns, and many other aspects of web content that affect accessibility.

Automated vs. Guided Testing

A key distinction that axe Pro makes--and that is essential for understanding effective accessibility auditing--is the difference between automated and guided testing:

Automated testing uses algorithms to scan pages and identify issues that can be detected through code analysis. This type of testing is fast, consistent, and can be run frequently throughout the development process.

Guided testing involves a trained accessibility evaluator following a structured process to identify issues that automated tools cannot catch. This includes testing with actual assistive technologies, evaluating the quality of alternative text and labels, checking for logical heading structures, and many other assessments that require human judgment.

Axe Pro provides guided testing protocols that walk testers through these assessments step by step, ensuring consistency and thoroughness while reducing the training required for team members to perform effective manual testing.

Getting Started with Automated Testing in Axe Pro

Automated accessibility testing with axe Pro begins with understanding what the tool can detect and how to configure it for your specific needs. The platform offers multiple ways to run automated tests, from browser extensions for quick spot-checks to command-line interfaces for integration into continuous integration pipelines.

Browser Extension Testing

The axe DevTools browser extension provides the fastest way to begin testing accessibility on any website. Available for Chrome, Firefox, and Edge, the extension adds an accessibility panel to your browser's developer tools that can scan the current page and return results in seconds.

When you run a test using the browser extension, axe scans the page and categorizes issues by severity: critical, serious, moderate, and minor. Each issue includes a description of the problem, the WCAG criterion it violates, guidance on how to fix it, and code examples showing correct implementation.

Integrating into Development Workflows

For organizations committed to accessibility, axe Pro should be integrated into automated workflows where tests run consistently without manual intervention:

1. Unit and Integration Tests: Use axe-core within test suites with Jest, Selenium, Playwright, or Cypress
2. CI/CD Pipelines: Add axe checks to your continuous integration pipelines
3. Scheduled Audits: Use axe Pro's API to run comprehensive audits on a regular schedule

Understanding Automated Test Results

Interpreting automated accessibility test results requires understanding both what the tests can detect and what they cannot. Axe Core can reliably detect:

• Missing alternative text on images
• Missing form labels
• Improper heading hierarchy
• Missing ARIA landmarks
• Color contrast failures

However, it cannot determine whether alternative text is actually descriptive, whether a page's heading structure makes sense semantically, or whether keyboard focus order is logical. Our guide on testing TypeScript apps using Jest demonstrates how to integrate accessibility checks into automated test suites effectively.

Mastering Guided Testing for Comprehensive Audits

While automated testing catches the low-hanging fruit of accessibility issues, truly comprehensive accessibility audits require guided testing performed by trained evaluators. Axe Pro provides structured protocols for guided testing that walk testers through systematic evaluations of different aspects of accessibility.

The Guided Testing Methodology

Guided testing in axe Pro follows established accessibility evaluation methodologies, including the WCAG-EM (Website Accessibility Conformance Evaluation Methodology) approach recommended by the W3C. This methodology defines a process for sampling pages, testing them against WCAG criteria, and reporting findings in a consistent format.

When conducting guided testing, evaluators use actual assistive technologies including:

• Screen readers (JAWS, NVDA, VoiceOver)
• Keyboard-only navigation
• Browser accessibility tools

Testing with Assistive Technologies

A critical component of guided accessibility testing is evaluating how well a website works with the assistive technologies that people with disabilities actually use:

Screen reader testing evaluates how content is announced to users who rely on speech or braille output. Testers navigate through pages, noting instances where content is not announced correctly or where the navigation experience is confusing.

Keyboard testing verifies that all functionality is accessible without a mouse, including proper focus indicators, logical tab order, and absence of keyboard traps.

Checkpoints and Evaluation Criteria

Axe Pro's guided testing organizes evaluations around checkpoints that correspond to specific accessibility requirements. Each checkpoint defines what should be tested, how to test it, and what constitutes a pass or fail. This structure ensures evaluations are thorough and consistent.

Building Accessibility Testing into Your Development Process

Effective accessibility is not a one-time effort but an ongoing practice integrated throughout the development lifecycle. Organizations that successfully maintain accessible websites typically have established processes that incorporate accessibility testing at every phase.

Shifting Left: Testing Early and Often

The most effective time to catch accessibility issues is during design and development, before they become embedded in the codebase. Integrating axe Pro into development workflows makes accessibility testing a natural part of the coding process:

• During Development: Run quick checks as you work, fixing issues immediately
• Code Reviews: Include accessibility checklists that prompt reviewers to verify accessibility
• CI/CD Pipelines: Run automated axe tests on every commit, catching regressions before production

Our guide on dependency injection in React demonstrates patterns for building testable components that support accessibility verification throughout development. Similarly, understanding CSS fundamentals like proper font handling helps prevent common accessibility issues from the start.

Collaborative Accessibility Reviews

Axe Pro includes features designed for team collaboration on accessibility findings:

• Assign findings to team members for remediation
• Track progress through standard workflows
• Document solutions for future reference
• Share observations about recurring patterns

Continuous Monitoring and Maintenance

Websites change constantly, and accessibility can regress when new content is added. Continuous monitoring ensures issues are detected quickly:

• Configure axe Pro to run regular audits of production websites
• Alert teams when new issues are detected
• Monitor content-heavy websites where non-technical creators add content

Reporting and Remediation Strategies

The value of accessibility testing is realized only when findings lead to actual improvements. Axe Pro includes comprehensive reporting features designed to help teams understand their accessibility state, prioritize remediation work, and track progress over time.

Understanding Report Types

Axe Pro generates different types of reports for different audiences:

Executive summaries provide high-level overviews of accessibility status suitable for leadership presentations, highlighting major issues and trends without technical detail.

Detailed technical reports contain complete listings of all issues found, with specific element references, code snippets, and remediation guidance.

Historical reports track accessibility metrics over time, showing whether accessibility is improving or regressing across audits.

Prioritizing Remediation Work

Not all accessibility issues have the same impact or urgency. Consider these factors when prioritizing:

1. Severity: Critical issues blocking access should be addressed first
2. Frequency: Issues affecting high-traffic pages deserve attention
3. Effort: Balance impact against remediation complexity
4. Compliance: Legal requirements may dictate prioritization

Tracking Progress and Maintaining Momentum

Accessibility is not a destination but an ongoing journey. Track accessibility metrics to:

• Understand whether efforts are effective
• Identify areas needing additional attention
• Demonstrate value of accessibility investment
• Build accountability across teams

Consistent tracking, combined with our CSS fundamentals guides, helps teams build accessible websites from the ground up. Regular audits ensure that accessibility remains a priority as websites evolve.

Sources

1. Deque axe DevTools
2. Deque axe Auditor Documentation
3. W3C Accessibility Evaluation Tools - W3C