WCAG 2.1 Conformance Levels

This page organizes the Web Content Accessibility Guidelines (WCAG) success criteria by conformance level into a list. This meant to help you work your way up to AA and AAA.

The WCAG is organized according to Perceivable, Operable, Understandable, Robust (POUR) principles, but in practice, developers and managers are focused on meeting requirements. Organizing the criteria based on ease and complexity is more suited for work.

Level A #

1.1.1 Non-text Content
1.2.1 Audio-only and Video-only (Prerecorded)
1.2.2 Captions (Prerecorded)
1.2.3 Audio Description or Media Alternative (Prerecorded)
1.3.1 Info and Relationships
1.3.2 Meaningful Sequence
1.3.3 Sensory Characteristics
1.4.1 Use of Color
1.4.2 Audio Control
2.1.1 Keyboard
2.1.2 No Keyboard Trap
2.1.4 Character Key Shortcuts
2.2.1 Timing Adjustable
2.2.2 Pause, Stop, Hide
2.3.1 Three Flashes or Below Threshold
2.4.1 Bypass Blocks
2.4.2 Page Titled
2.4.3 Focus Order
2.4.4 Link Purpose (In Context)
2.5.1 Pointer Gestures
2.5.2 Pointer Cancellation
2.5.3 Label in Name
2.5.4 Motion Actuation
3.1.1 Language of Page
3.2.1 On Focus
3.2.2 On Input
3.3.1 Error Identification
3.3.2 Labels or Instructions
4.1.1 Parsing
4.1.2 Name, Role, Value

Level AA #

1.2.4 Captions (Live)
1.2.5 Audio Description (Prerecorded)
1.3.4 Orientation
1.3.5 Identify Input Purpose
1.4.3 Contrast (Minimum)
1.4.4 Resize text
1.4.5 Images of Text
2.4.5 Multiple Ways
2.4.6 Headings and Labels
2.4.7 Focus Visible
3.1.2 Language of Parts
3.2.3 Consistent Navigation
3.2.4 Consistent Identification
3.3.3 Error Suggestion
3.3.4 Error Prevention (Legal, Financial, Data)
4.1.3 Status Messages

Level AAA #

1.2.6 Sign Language (Prerecorded)
1.2.7 Extended Audio Description (Prerecorded)
1.2.8 Media Alternative (Prerecorded)
1.2.9 Audio-only (Live)
1.3.6 Identify Purpose
1.4.6 Contrast (Enhanced)
1.4.7 Low or No Background Audio
1.4.8 Visual Presentation
1.4.9 Images of Text (No Exception)
2.1.3 Keyboard (No Exception)
2.2.3 No Timing
2.2.4 Interruptions
2.2.5 Re-authenticating
2.2.6 Timeouts
2.3.2 Three Flashes
2.3.3 Animation from Interactions
2.4.8 Location
2.4.9 Link Purpose (Link Only)
2.5.5 Target Size
2.5.6 Concurrent Input Mechanisms
3.1.3 Unusual Words
3.1.4 Abbreviations
3.1.5 Reading Level
3.1.6 Pronunciation
3.2.5 Change on Request
3.3.5 Help
3.3.6 Error Prevention (All)

What are levels of conformance? #

WCAG 2.0 guidelines are categorized into three levels of conformance in order to meet the needs of different groups and different situations: A (lowest), AA (mid range), and AAA (highest)… Level A sets a minimum level of accessibility and does not achieve broad accessibility for many situations. For this reason, UC recommends AA conformance for all Web-based information.
University of California

Level AA conformance includes 100% of A criteria and 100% of AA criteria.

For Level AA conformance, the Web page satisfies all the Level A and Level AA Success Criteria, or a Level AA conforming alternate version is provided.

Understanding Conformance Requirements

References #