The Web Content Accessibility Guidelines 2.2 define 87 success criteria across three conformance levels (A, AA, AAA). Level AA is mandatory for BFSG and EAA. This checklist highlights the most practically relevant criteria.
1.1.1 Non-text content: images, icons and graphics need alt text. 1.3.1 Info and relationships: structure must be discernible without CSS. 1.4.3 Contrast (minimum): text requires a contrast ratio of at least 4.5:1. 1.4.4 Resize text: text must be resizable up to 200% without loss of content or functionality.
2.1.1 Keyboard: all functionality must be operable via keyboard. 2.4.3 Focus order: the tab sequence must be meaningful. 2.4.7 Focus visible: focused elements must be visibly highlighted. 2.5.3 Label in name: visible labels must match the accessible name.
3.1.1 Language of page: the primary language must be declared in the HTML lang attribute. 3.2.1 On focus: focus must not trigger unexpected context changes. 3.3.1 Error identification: error messages must identify the affected field and describe how to correct the error.
4.1.1 Parsing: HTML must be valid — no duplicate IDs, correct nesting. 4.1.2 Name, role, value: all UI components must be programmatically determinable. 4.1.3 Status messages: status messages must be conveyed via ARIA live regions without requiring a focus change.
2.4.11 Focus not obscured (minimum): a focused element must not be entirely hidden behind other elements. 2.5.7 Dragging movements: drag-and-drop interactions must also be operable with a simple pointer action (click/tap). 3.2.6 Consistent help: help mechanisms must be placed consistently.
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