5 Level A criteria5 Level AA criteria

Understandable — 10 WCAG Criteria

The Understandable principle ensures that information and the operation of the user interface must be understandable. This includes making text readable and understandable, making pages appear and operate in predictable ways, and helping users avoid and correct mistakes in forms.

The 10 criteria

3.1.1A
Language of Page
3.1.2AA
Language of Parts
3.2.1A
On Focus
3.2.2A
On Input
3.2.3AA
Consistent Navigation
3.2.4AA
Consistent Identification
3.3.1A
Error Identification
3.3.2A
Labels or Instructions
3.3.3AA
Error Suggestion
3.3.4AA
Error Prevention (Legal, Financial, Data)

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Principle description

The 10 criteria

Test the “Understandable” principle on your site