The Web Content Accessibility Guidelines (WCAG), created by the W3C’s Web Accessibility Initiative, define the international benchmark for making websites and digital services usable by everyone, including people with disabilities.
These guidelines set clear technical and design principles to help ensure equal access to digital content, regardless of users’ abilities or the technology they use.
The WCAG 2.0, 2.1, and 2.2 versions are successive improvements of the same framework. Version 2.0 was released in 2008, 2.1 added criteria for mobility and mobile in 2018, and 2.2 (2023) enhances accessibility for cognitive challenges. All versions are compatible and based on the same four principles.α
The WCAG standards are organized into three levels of compliance: A, AA, and AAA, with increasing degrees of accessibility.


