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WCAG Explorer (beta)

This resource is designed for anyone eager to master digital accessibility. Explore WCAG success criteria through clear, easy-to-understand descriptions. We owe a special "hat tip" to Johannes Lehner’s WCAG Card Deck, which served as the inspiration for this project.

We plan to expand this library over time, so please check back regularly for updates.

11 success criteria found for Level AA and Perceivable principle and

Success criterion 1.2.4 Captions (Live)

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Live video with audio must include real-time captions that cover:

  • speech and
  • important sound effects (like music, alarms, or laughter)

Success criterion 1.2.5 Audio Description (Prerecorded)

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Important visual content in prerecorded videos with audio must be described using:

  • an audio description,
  • unless it is already explained in the main audio track

Success criterion 1.3.4 Orientation [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: GESTURES

Content must remain readable and usable in both portrait and landscape orientation, unless a specific one is essential (e.g. in a piano app that requires landscape to show the full keyboard).

Success criterion 1.3.5 Identify Input Purpose [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: FORMS

The purpose of common form fields (like name, email, or address) must be defined in the code so that browsers and assistive technologies can offer input support, such as autocomplete.

Success criterion 1.4.10 Reflow [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: GESTURES ZOOM AND LEGIBILITY

Content remains functional and easy to read when:

  • zoomed to 400% or
  • viewed at 320px width,

without needing to scroll in two directions (except for tables, maps, and similar content).

Success criterion 1.4.11 Non-text Contrast [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY

Interactive controls (e.g. buttons, form fields, focus indicators) and graphics that convey meaning (e.g. icons, charts, graph lines) must have a contrast ratio of at least 3:1 against adjacent colours.

Success criterion 1.4.12 Text Spacing [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: ZOOM AND LEGIBILITY

Text remains readable and usable when spacing is changed using custom styles to at least:

  • 1.5× line height,
  • 2× spacing after paragraphs,
  • 0.12× letter spacing,
  • 0.16× word spacing,

without content being hidden, cut off, or broken.

Success criterion 1.4.13 Content on Hover or Focus [2.1 and 2.2]

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: GESTURES KEYBOARD ZOOM AND LEGIBILITY

When additional content appears on hover or keyboard focus (including long press on touch), it must:

  • stay visible until dismissed or no longer valid,
  • be dismissible (e.g. using the [esc] key), and
  • remain visible when hovered or focused.

Success criterion 1.4.3 Contrast (Minimum)

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY ZOOM AND LEGIBILITY

Text contrast against its background must be at least:

  • 4.5:1 for normal text, or
  • 3:1 for large text (over 24px, or bold and over 19px).

Success criterion 1.4.4 Resize text

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: ZOOM AND LEGIBILITY

Text remains readable and usable when zoomed to 200%.

Success criterion 1.4.5 Images of Text

Level Level AA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY ZOOM AND LEGIBILITY

Text must be actual text, not images of text, unless a specific visual presentation is absolutely necessary (e.g. logo).