Third-Party Software
Accessibility Tracker is built on the shoulders of outstanding open-source projects. We believe in transparency and giving credit to the tools that power our platform.
axe-core
by Deque Systems, Inc.
axe-core is the world's leading open-source accessibility testing engine, developed and maintained by Deque Systems. It provides automated accessibility rule checking against WCAG 2.0, 2.1, 2.2, and other accessibility standards.
The engine is used by millions of developers worldwide and powers accessibility testing in tools like Google Lighthouse, Microsoft Accessibility Insights, and now Accessibility Tracker.
How We Use axe-core
Automated Scanning
Powers our core accessibility audit engine that scans web pages for WCAG violations across your entire site.
Rule-Based Analysis
Provides 90+ accessibility rules covering WCAG 2.0 A, AA, AAA and WCAG 2.1, 2.2 criteria.
Violation Reporting
Generates detailed violation reports with actionable remediation guidance for each issue found.
Impact Classification
Categorizes issues by severity (critical, serious, moderate, minor) to help you prioritize fixes.
License — MPL-2.0
The Mozilla Public License 2.0 is a permissive open-source license maintained by the Mozilla Foundation. It strikes a balance between copyleft and permissive licensing, allowing broad usage while requiring modifications to licensed files to remain open-source.
- Commercial use
- Distribution
- Modification
- Patent use
- Private use
- Disclose source (modified files)
- License & copyright notice
- Same license (modified files)
- Liability
- Trademark use
- Warranty
Legal Notices
Trademark Notice
AXE and AXE-CORE are trademarks of Deque Systems, Inc. Use of the axe-core library in Accessibility Tracker does not imply endorsement, sponsorship, or affiliation with Deque Systems, Inc.
Copyright
Copyright © Deque Systems, Inc. All rights reserved. The axe-core source code is made available under the terms of the Mozilla Public License 2.0.
About This Page
This page provides attribution and license information for third-party open-source software used in Accessibility Tracker, as required by their respective licenses. We are committed to complying with all open-source license obligations and supporting the open-source community. If you have questions about our use of open-source software, please contact us.