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Quick reference: Web Content Accessibility Guidelines (WCAG) 2.0

Conformance Requirement 1 - Conformance Level

One of the following levels of conformance is met in full.

  • Level A: For Level A conformance (the minimum level of conformance), the Web page satisfies all the Level A Success Criteria, or a conforming alternate version is provided.
  • Level AA: For Level AA conformance, the Web page satisfies all the Level A and Level AA Success Criteria, or a Level AA conforming alternate version is provided.
  • Level AAA: For Level AAA conformance, the Web page satisfies all the Level A, Level AA and Level AAA Success Criteria, or a Level AAA conforming alternate version is provided.
Note 1: Although conformance can only be achieved at the stated levels, authors are encouraged to report (in their claim) any progress toward meeting success criteria from all levels beyond the achieved level of conformance.

Note 2: It is not recommended that Level AAA conformance be required as a general policy for entire sites because it is not possible to satisfy all Level AAA Success Criteria for some content.

Display success criteria:

Currently 61 of 61 Success Criteria are being displayed.

Principles, guidelines and success criteria

Principle 1 - Perceivable - Information and user interface components must be presentable to users in ways they can perceive.

Guideline 1.1 - Text Alternatives

Guideline 1.2 - Time-based Media

Guideline 1.3 - Adaptable

Guideline 1.4 - Distinguishable

Principle 2 - Operable - User interface components and navigation must be operable.

Guideline 2.1 - Keyboard Accessible

Guideline 2.2 - Enough Time

Guideline 2.3 - Seizures

Guideline 2.4 - Navigable

Principle 3 - Understandable - Information and the operation of user interface must be understandable.

Guideline 3.1 - Readable

Guideline 3.2 - Predictable

Guideline 3.3 - Input Assistance

Principle 4 - Robust - Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies.

Guideline 4.1 - Compatible

Conformance Requirements

In order for a Web page to conform to WCAG 2.0, all of the following conformance requirements must be satisfied:

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