Skipped Heading Level

Jumping from H2 to H4 (skipping H3) breaks the accessibility tree — screen readers announce a level that does not exist in the outline.

Why it matters

Jumping from H2 to H4 (skipping H3) breaks the accessibility tree — screen readers announce a level that does not exist in the outline.

Address when convenient — notices usually mark a polish opportunity rather than a defect. Estimated SEO impact: medium — measurable effect on click-through or relevance.

How to fix

• Demote the H4 to H3 to close the gap
• Or add an H3 section between the H2 and the H4
• Use the browser DevTools "Accessibility Tree" to verify the outline

Common causes

If the rule is firing across many pages, the root cause is almost always one of these:

• Editorial team copy-pastes from another page and brings its heading levels with it.
• Theme uses headings for visual styling rather than document structure.
• WYSIWYG editor inserts new headings at whichever level the cursor was last on.
• Multi-author pages stitch sections together without a single owner of the outline.

Anti-patterns to avoid

Even with the best intentions, these "fixes" make the issue worse — recognise them so you don't ship them:

• Skipping levels (<h1> directly to <h4>) for visual styling.
• Multiple <h1>s on one page because each section "felt like a top heading".
• Using headings as decorative dividers without semantic content.

How atlookup detects this

Our crawler renders each page with a real headless browser, then walks the heading tree and checks for missing levels, duplicates, and skipped depths. Pages where the rule fires for skipped heading level are flagged on the report.

If you'd like to see this rule fire on your own site, run a free 60-second audit — every page is reported with the exact lines that triggered it.

Tools to verify the fix

Once you've applied the fix, double-check with these external validators:

• axe DevTools — Flags heading-order violations (a11y + SEO).
• HeadingsMap — Browser extension that visualises the heading tree.

Frequently asked questions

Related issues