Matan · WCAG · Understandable

Heading hierarchy

Do not skip levels (H1 → H3) — WCAG 1.3.1 information and relationships.

Pass condition in our engine: Heading levels do not skip.

1. Problem description

Skipped levels make the outline lie. Page builders that start a block at H3 because it “looks right” are the usual cause. We also fail if the sequence jumps after the first heading.

2. Most common causes

  • Visual hierarchy chosen without changing the tag.
  • Reusable blocks hard-coded as H3.

3. How to fix it

  1. Start with H1, then H2, then H3.
  2. Change CSS, not the heading level, to get the size you want.

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