WCAG (Web Content Accessibility Guidelines)– A set of international standards and recommendations that determine how web content should be accessible to all users, including people with disabilities. These rules were created by the Web Accessibility Initiative (WAI) within World Wide Web Consortium (W3C)
Key concepts
- Accessibility: The ability of web content to be usable by the widest range of people, including individuals with visual, auditory, mobility, or cognitive impairments.
- POUR principles: The fundamental pillars of WCAG:
- Perceivable: Information must be presented in a way that users can perceive (e.g., alternative text for images).
- Operable: All functionalities must be operable (e.g., also via keyboard).
- Understandable: Content and controls must be understandable and predictable.
- Robust: Content must be robust enough to be processed by various assistive technologies.
- Conformance levels: WCAG defines three levels of conformance: A (basic), AA (recommended), AAA (highest).
- Assistive technologies: Software or hardware that helps people with disabilities use the web (e.g., screen readers).
Help with WCAG
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Links to encyclopedias and expert sources
| Title/Description | Link |
|---|---|
| Slovak overview of WCAG 2.1 | Rules for web content accessibility (WCAG) 2.1 – Slovak translation |
| Glossary and explanation of WCAG | Web Content Accessibility Guidelines (WCAG) – LoadFocus |
| Expert article on WCAG | What is WCAG and why should every developer know it? |
| Czech Wikipedia | Web Content Accessibility Guidelines – Wikipedia |
| English Wikipedia | Web Content Accessibility Guidelines – Wikipedia |
| Official W3C page | WCAG 2 Overview – Web Accessibility Initiative (WAI) |
| Overview of WCAG principles | Understanding WCAG 2.2 – GOV.UK |
Note
As of June 28, 2025, the European Accessibility Act (EAA) will come into effect, requiring selected products and services to be accessible according to the standards of WCAG.