HTML nesting error Accessibility Checkpoint


This page has markup errors, causing screen readers to miss content.


Fix the errors listed on the Standards tab of this report. Markup errors like missing end tags mean screen readers may skip important content.

Applicable standards

Note: Section 508 Refresh (2017) checkpoints are equivalent to WCAG 2.0 level A and level AA checkpoints.

Change history

  • 6.50 Oct 2023 Removed because WCAG 4.1.1 is now marked obsolete.
  • 5.9 Jun 2015 Don’t fire for redundant end tags.
  • 5.8 Mar 2015 Fixed false positive on some XHTML elements.
  • 5.4 Feb 2014 Don’t fire on unrecognized attributes like srcset.
  • 5.3 Sep 2013 Fire on more HTML 5 validation errors.
  • 5.2 May 2013 Don’t fire on empty elements in XHTML missing the self closing tag (technically incorrect, but never causes problems).
  • 5.0 Oct 2012 Now fires on invalid HTML 5 documents.
  • 4.4 Aug 2011 Now fires when elements used in wrong place (e.g. P inside HEAD element), when start tags don’t have closing bracket, and attributes don’t have closing quote.
  • 3.0 Dec 2008 Added.

This page describes a web site issue detected in HTML documents by SortSite Desktop and OnDemand Suite.

Rule ID: AccWcag2-F70-1