Understand the WCAG: definition and stakes of web accessibility

10 September 2025

découvrez les wcag, les directives pour l’accessibilité du contenu web, afin de rendre vos sites internet accessibles à tous, y compris aux personnes en situation de handicap.

Increasing web accessibility is a major challenge for developers and designers today. The WCAG (Web Content Accessibility Guidelines) provide a framework for creating online content that is perceivable, operable, understandable, and robust. Understanding these guidelines is not just about meeting standards, but also engages businesses to respond to the needs of a diverse audience, thereby improving the user experience while avoiding potential legal issues related to non-compliance.

The WCAG, or Web Content Accessibility Guidelines, represent an essential framework to ensure that digital content is accessible to everyone, including people with disabilities. Developed by the World Wide Web Consortium (W3C), the WCAG aim to make the web more inclusive since their first publication in 1999.

The latest version, WCAG 2.2, introduces enhanced criteria to address the ever-evolving accessibility challenges. These guidelines are formed around four fundamental principles: Perceivable, Operable, Understandable, and Robust, often summarized by the acronym POUR.

The first principle, Perceivable, states that information must be presented in such a way that all users can perceive it. This includes elements such as alternative text for images and captions for audio content. By making information visible and audible to everyone, we ensure that no user is left out.

Next, the Operable principle emphasizes that users must be able to interact with the content. This could mean providing effective keyboard navigation for those who cannot use a mouse, or allowing adjustable time limits for those who need more time to interact with the content.

The Understandable principle highlights the necessity for the content and interface to be clear and easy to understand. Concise language, predictable navigation patterns, and clear error messages with suggestions for correction are some examples that enhance user comprehension.

Finally, the Robust principle concerns the compatibility of content with a wide range of assistive technologies. This involves, among other things, the use of appropriate web standards such as HTML and ARIA Roles to ensure that the content remains accessible as technologies and user agents evolve.

The issue of the WCAG goes far beyond simple compliance. By accessing properly adapted web content, individuals with disabilities can fully participate in digital life. This contributes not only to a more inclusive society but also to a better user experience for everyone. Studies show that accessible sites are often easier to navigate and use, benefiting all users, not just those with functional limitations.

Legally, many regulations around the world reference the WCAG as standards for compliance. Due to their importance, non-compliance with these standards can lead to legal implications for organizations, particularly regarding the Americans with Disabilities Act (ADA) in the United States and other legislations worldwide.

Within the context of the Silver economy, accessibility challenges become even more crucial to meet the needs of an aging population. Emerging solutions, such as the use of robots and technological tools to improve seniors’ lives, must integrate the principles of the WCAG to ensure that everyone can benefit from digital advancements. By continuing to evolve with new technologies and adhering to accessibility guidelines, we can build a web where every user feels valued and respected.

discover the wcag (web content accessibility guidelines) standards: principles, levels of compliance, and best practices to make your websites accessible to all, including people with disabilities.

FAQ about WCAG and web accessibility

Q : What are the WCAG?

A : The WCAG, or Web Content Accessibility Guidelines, are guidelines developed to make web content more accessible to people with disabilities.

Q : Why are the WCAG important?

A : Adhering to the WCAG improves the user experience for everyone by making websites easier to navigate and use. Additionally, compliance with the WCAG is often a legal requirement.

Q : What are the fundamental principles of the WCAG?

A : The principles of the WCAG are summarized by the acronym POUR: Perceivable, Operable, Understandable, and Robust.

Q : What is the difference between compliance levels A, AA, and AAA?

A : The A level meets the minimum requirements, the AA level is the recommended standard, and the AAA level offers the highest degree of accessibility, although it is less practical to achieve.

Q : How to comply with the WCAG?

A : To comply with the WCAG, it is recommended to start with an accessibility audit, conduct manual testing, and involve users with disabilities in the testing process.

Q : Are the WCAG legally binding?

A : In many jurisdictions, the WCAG are referenced in laws that require compliance with accessibility standards, although the guidelines themselves are not legal documents.

Q : How to maintain compliance with the WCAG?

A : It is essential to integrate accessibility from the initial design, train the development team, and conduct regular checks during content or feature updates.