WCAG Guideline 5.4: Statement of Partial Conformance – Third Party Content Explained
Estimated read time: 5–6 minutes
Guideline 5: Emerging Technologies
The Emerging Technologies principle ensures that new and evolving web technologies are accessible to all users, including those with disabilities.
Guideline 5.4: Statement of Partial Conformance – Third Party Content
Guideline 5.4 provides a way to document accessibility when your web page includes content you do not control, such as third-party widgets, ads, or embedded media.
What Is a Statement of Partial Conformance?
A statement of partial conformance is a public note that a web page would conform to WCAG except for specific third-party content that is outside your control.
- Used when you cannot make all content accessible
- Applies to ads, widgets, embedded media, or other third-party elements
- Helps clarify your accessibility efforts and limitations
When to Use a Statement of Partial Conformance
- When your page includes content from third parties you cannot modify
- When you want to be transparent about what you can and cannot control
- When you want to show your commitment to accessibility despite limitations
For more, see W3C’s guidance on Partial Conformance .
How to Make a Statement of Partial Conformance
- Clearly state that the page would conform except for specific third-party content
- Identify the third-party content and its source
- Explain why you cannot make it accessible
- Optionally, provide contact info for feedback or alternatives
Common Mistakes to Avoid
- Not identifying third-party content in your statement
- Making a partial conformance claim when you could control the content
- Failing to update the statement if third-party content changes
Quick Checklist
- Statement is clear and specific about third-party content
- Third-party sources are identified
- Users are informed about accessibility limitations
- Statement is kept up to date
Summary
Guideline 5.4 allows you to be transparent about accessibility when you include third-party content you cannot control. Use a clear, honest statement to help users understand your site’s accessibility status.
Partial conformance is honest—show your commitment to accessibility!