Level A

Level A is the minimum level of conformance in the Web Content Accessibility Guidelines (WCAG) 2.0. For Level A conformance, the Web page satisfies all the Level A Success Criteria, or a conforming alternate version is provided.

Some WCAG 2.0 Level A requirements include:

  • No keyboard traps
  • Navigable with a keyboard
  • Non-text content alternatives
  • Video Captions
  • Meaning is not conveyed through shape, size, color etc. alone

There are 25 Level A guidelines

1.1 Text Alternatives

Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language.

Success Criterion 1.1.1 Non-Text Content

1.2 Time-based Media

Provide alternatives for time-based media.

Success Criterion 1.2.1 Audio-only and Video-only (Prerecorded)

Success Criterion 1.2.2 Captions (Prerecorded)

Success Criterion 1.2.3 Audio Description or Media Alternative (Prerecorded)

1.3 Adaptable

Create content that can be presented in different ways (for example simpler layout) without losing information or structure.

Success Criterion 1.3.1 Info and Relationships

Success Criterion 1.3.2 Meaningful Sequence

 Success Criterion 1.3.3 Sensory Characteristics

1.4 Distinguishable

Make it easier for users to see and hear content including separating foreground from background.

Success Criterion 1.4.1 Use of Color

Success Criterion 1.4.2 Audio Control

2.1  Keyboard Accessible

Make all functionality available from a keyboard.

Success Criterion 2.1.1 Keyboard

Success Criterion 2.1.2 No Keyboard Trap

2.2 Enough Time

Provide users enough time to read and use content.

Success Criterion 2.2.1 Timing Adjustable

Success Criterion 2.2.2 Pause, Stop, Hide

2.3 Seizures and Physical Reactions

Do not design content in a way that is known to cause seizures or physical reactions.

Success Criterion 2.3.1 Three Flashes or Below Threshold

2.4 Navigable

Provide ways to help users navigate, find content, and determine where they are.

Success Criterion 2.4.1 Bypass Blocks

Success Criterion 2.4.2 Page Titled

Success Criterion 2.4.3 Focus Order: 

Success Criterion 2.4.4 Link Purpose (In Context) 

3.1  Readable

Make text content readable and understandable.

Success Criterion 3.1.1 Language of Page

3.2 Predictable

Success Criterion 3.2.1 On Focus

Success Criterion 3.2.2 On Input

3.3 Input Assistance

Help users avoid and correct mistakes.

Success Criterion 3.3.1 Error Identification

Success Criterion 3.3.2 Labels or Instructions: 

4.1  Compatible

Maximize compatibility with current and future user agents, including assistive technologies.

Success Criterion 4.1.1 Parsing

Success Criterion 4.1.2 Name, Role, Value: 

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