Evaluation and tools
WCAG 2.0 has 12 guidelines that are organized under 4 principles:
-
perceivable,
-
operable,
-
understandable and
-
robust.
For each guideline, there are testable success criteria, which are at three levels: A, AA, and AAA.
Each guideline is associated with one or more checkpoints describing how to apply that guideline to particular features of Web pages.
WCAG 2.0 Evaluation
Level A and AA success criteria that must be met in order to comply with the Double-A level of the Web Content Accessibility Guidelines 2.0.
|
WCAG 2.0 |
DESCRIPTION |
LEVEL |
|
1.1.1 |
Non-text Content |
A |
|
1.2.1 |
Audio-only and Video-only (Pre-recorded) |
A |
|
1.2.2 |
Captions (Pre-recorded) |
A |
|
1.2.3 |
Audio Description or Media Alternative (Pre-recorded) |
A |
|
1.2.4 |
Captions (Live) |
AA |
|
1.2.5 |
Audio Description (Pre-recorded) |
AA |
|
1.3.1 |
Info and Relationships |
A |
|
1.3.2 |
Meaningful Sequence |
A |
|
1.3.3 |
Sensory Characteristics |
A |
|
1.4.1 |
Use of Colour |
A |
|
1.4.2 |
Audio Control |
A |
|
1.4.3 |
Contrast (Minimum) |
AA |
|
1.4.4 |
Resize text |
AA |
|
1.4.5 |
Images of Text |
AA |
|
2.1.1 |
Keyboard |
A |
|
2.1.2 |
No Keyboard Trap |
A |
|
2.2.1 |
Timing Adjustable |
A |
|
2.2.2 |
Pause, Stop, Hide |
A |
|
2.3.1 |
Three Flashes or Below Threshold |
A |
|
2.4.1 |
Bypass Blocks |
A |
|
2.4.2 |
Page Titled |
A |
|
2.4.3 |
Focus Order |
A |
|
2.4.4 |
Link Purpose (In Context) |
A |
|
2.4.5 |
Multiple Ways |
AA |
|
2.4.6 |
Headings and Labels |
AA |
|
2.4.7 |
Focus Visible |
AA |
|
3.1.1 |
Language of Page |
A |
|
3.1.2 |
Language of Parts |
AA |
|
3.2.1 |
On Focus |
A |
|
3.2.2 |
On Input |
A |
|
3.2.3 |
Consistent Navigation |
AA |
|
3.2.4 |
Consistent Identification |
AA |
|
3.3.1 |
Error Identification |
A |
|
3.3.2 |
Labels or Instructions |
A |
|
3.3.3 |
Error Suggestion |
AA |
|
3.3.4 |
Error Prevention (Legal, Financial, Data) |
AA |
|
4.1.1 |
Parsing |
A |
|
4.1.2 |
Name, Role, Value |
A |
Evaluation tools
Semi-automated tools
- Total Validator - evaluates WCAG 2.0 AA
- T.A.W. - validates WCAG 2.0 AA
- Wave
- ATRC web accessibility checker - validates WCAG 2.0 AA
- and others: Evaluation and Repair Tools
Browser add-ons and colour contrast analyser
- The Web Accessibility Toolbar (Internet Explorer, Opera)
- Web Developer toolbar (Firefox, Opera)
Colour contrast analysers:
- Luminosity Colour Contrast Ratio Analyser
- Colour Oracle
- Automatic evaluation of the color accessibility of a webpage
Assistive technology
- Built‐in accessibility
- Screen readers: JAWS, NVDA, VoiceOver, Orca...
- Magnification: ZoomText, MAGic, Zoom...
- Voice recognition: Dragon Naturally Speaking, Mac dictate, Voice Command Recognition
- Mobile
- Screen readers: Talks, Mobile speak, VoiceOver, Orator...
- Magnification: Zooms, Mobile magnifier
