WCAG – Web Content Accessibility Guidelines
The WCAG (Web Content Accessibility Guidelines) are international standards developed by the World Wide Web Consortium (W3C) to make digital content accessible to all users, including people with disabilities.
The guidelines define how websites, apps, and digital services must be perceivable, operable, understandable, and robust – the four principles of accessible design.
The current standard is WCAG 2.1, with WCAG 2.2 officially published in October 2023, expanding the scope to include cognitive, mobile, and low-vision accessibility.
WCAG Principles (POUR)
According to WCAG, accessible content must be:
- Perceivable – content must be presented in ways users can perceive (e.g., text alternatives, captions)
- Operable – functionality must be usable via keyboard or assistive tech
- Understandable – content and navigation must be clear and predictable
- Robust – content must work with current and future technologies (screen readers, browsers, etc.)
The WCAG is divided into three conformance levels:
- Level A – minimum accessibility requirements
- Level AA – widely accepted standard (required for legal compliance in many countries)
- Level AAA – optimal accessibility, hard to meet across entire websites
Why WCAG Matters
- Legal compliance: Required in the EU under the European Accessibility Act and for public sector websites via national regulations like BITV (Germany)
- Inclusive design: Enables digital equality and universal access
- SEO benefits: Accessibility overlaps with technical SEO and improves crawlability and UX
- Better usability: Accessible sites are easier to use for everyone
You can find out more about our services in the area of digital accessibility here.
