Accessibility best practice

Heading levels should only increase by one

Heading levels skip (for example from H2 to H4), which makes the page structure confusing for screen reader users.

What this rule checks

Ensure the order of headings is semantically correct.

Why it matters

Screen reader users navigate by headings. This is a best practice supporting WCAG 1.3.1.

This rule is a recommended practice: failing it isn't a WCAG failure on its own, so our reports list it separately from WCAG failures.

How to fix it

  1. Adjust the heading levels in the affected sections so they go in order without skipping levels.
  2. Change only the tag, not the visual style (use CSS classes for size).

How to check the fix

  • Re-scan and check the heading outline with a browser extension such as HeadingsMap.

How FixReports finds it

Our scan runs the axe-core rule heading-order in a real Chrome browser on every page it tests, and reports each failing element with its page, its markup and, where it applies, a screenshot.

An automated test confirms that this specific problem is present. It can't tell whether the rest of the page is accessible: some barriers only show up when a person checks the page.

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