Checkers

Heading Structure Checker

Paste a page's headings to spot a missing or duplicate H1 and skipped heading levels.

Educational simulationNo live search data: scenarios are fictional and measurements are approximate.
Instructions
  1. Enter one heading per line, starting with its level, for example "H1: Emergency Plumbing in Phoenix". You can also paste HTML headings.
  2. Review the outline and the problems found.
  3. Fix the structure and check again until it is clean, then save it.

Input

One per line, like "H2: Our services". HTML such as <h2>Our services</h2> also works.

Output

Results appear here as you work.

Explain your reasoning in a few sentences. It is saved with your work and great practice for client conversations.

Save or reset

You are not logged in, so work is saved in this browser only. Create a free account to keep it permanently. It moves to your account automatically.

Your saved work

    Learn more: Heading Structure Checker
    • Each page should have exactly one H1 that describes its main topic.
    • Headings should not skip levels on the way down (an H2 followed directly by an H4). Screen reader users navigate by headings, so a logical outline also improves accessibility.
    • Choose heading levels for structure, never for font size. Styling belongs in CSS.

    ← All tools