Comparison of Canvas Accessibility Tools: Accessibility Checker vs. UDOIT
This article lists the criteria which is checked for by the two Canvas accessibility tools: the Canvas Accessibility Checker in the Rich Content Editor, and UDOIT.
It is important to note that the Canvas Accessibility Checker can only check content edited in the Rich Content Editor. UDOIT can conduct a scan most areas of Canvas.
Instructors should use both tools to ensure their content is accessible as possible.
| Issue | Canvas Accessibility Checker | UDOIT* |
|---|---|---|
| Links | ||
| Links do not contain text | No | Yes |
| Link text is not meaningful | No | Yes (Suggestion) |
| Adjacent links do not have separators | Yes | No |
| Link anchors with images are missing alternate text | No | Yes |
| Image Alternate Text | ||
| Non-decorative images are missing alternate text | Yes | Yes |
| Images alternate text is the filename | Yes | Yes |
| Images alternate text is too long | Yes | Yes |
| Decorative images incorrectly have alternate text | No | Yes |
| Audio/Video | ||
| Multimedia objects are missing text equivalents | No | Yes |
| Animated GIFs may have been used | No | Yes (Suggestion) |
| Video is missing captions | No | Yes (Suggestion) |
| Videos are "not found" | No | Yes (Suggestion) |
| Captions do not match the language of the course | No | Yes (Suggestion) |
| Transcripts/captions does not change when media changes | No | Yes (Suggestion) |
| Multimedia requires a plugin | No | Yes (Suggestion) |
| Headings | ||
| Heading length is greater than 120 characters | Yes | No |
| Heading does not contain text | No | Yes (Suggestion) |
| Heading may be needed for course structure | No | Yes (Suggestion) |
| Headings are not sequential | Yes | No |
| Tables | ||
| Table is missing captions | Yes | No |
| Table is missing heading cells | Yes | Yes |
| Table headings are missing scope | Yes | Yes |
| Color and Design | ||
| Color contrast is not adequate | Yes | Yes |
| Color may be used for emphasis | No | Yes (Suggestion) |
| Styles may be used for structure | No | Yes (Suggestion) |
| Miscellaneous | ||
| Lists are not properly marked in HTML | Yes | No |
| Content length is more than 3000 words | No | Yes (Suggestion) |
* – When UDOIT can programmatically identify an issue, an Error is displayed in the course. When UDOIT can identify that something may be relevant, the issue is shown as a suggestion.