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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.

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Theme

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  • Wording

Principles

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  • Perceivable

13 success criteria found for Wording theme and Perceivable principle and

Success criterion 1.1.1 Non-text Content

Level Level A, WCAG principle: Perceivable

Assigned to the following themes: CODE AND LABELS SENSORY WORDING

All images and other non-text content (like icons, charts, audio, CAPTCHAs, or controls) must have a descriptive text alternative that conveys their meaning. Purely decorative content can be hidden from assistive technologies (e.g. using an empty alt attribute).

Success criterion 1.2.2 Captions (Prerecorded)

Level Level A, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Prerecorded videos with audio must have synchronised captions that include:

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

Success criterion 1.3.1 Info and Relationships

Level Level A, WCAG principle: Perceivable

Assigned to the following themes: CODE AND LABELS WORDING

Visual information and relationships (like labels, headings, or groupings) must also be conveyed in the code using:

  • semantic HTML (e.g. <label for="">, <ul>, <h1>), or
  • ARIA attributes (e.g. aria-describedby, role="group"),

so that assistive technologies can understand the structure.

Success criterion 1.3.2 Meaningful Sequence

Level Level A, WCAG principle: Perceivable

Assigned to the following themes: CODE AND LABELS WORDING

Content must follow a logical and meaningful order in the code so it can be understood correctly by assistive technologies even if the visual layout differs.

Success criterion 1.3.3 Sensory Characteristics

Level Level A, WCAG principle: Perceivable

Assigned to the following themes: FORMS SENSORY WORDING

Instructions and descriptions must not rely on sensory features alone, like color, shape, size, visual location, or sound.

Always provide additional text to clarify meaning.

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 1.2.7 Extended Audio Description (Prerecorded)

Level Level AAA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Prerecorded videos must include extended audio descriptions if important visual content like:

  • important visual details,
  • on-screen text not spoken aloud, or
  • scenes without natural audio breaks

can't be described during normal playback.

Success criterion 1.2.8 Media Alternative (Prerecorded)

Level Level AAA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Prerecorded videos must have a full text alternative that includes:

  • all speech,
  • relevant sound effects (like music, alarms, or laughter), and
  • important visual content,

even if captions and audio descriptions are already available.

Success criterion 1.2.9 Audio-only (Live)

Level Level AAA, WCAG principle: Perceivable

Assigned to the following themes: SENSORY WORDING

Live audio-only content must include a real-time text alternative, such as:

  • captions, or
  • live transcripts