HTML Heading Checker
Inspect h1-h6 heading structure and SEO hierarchy
100% free. This tool needs our server to do the work, so what you submit is sent there, processed and then discarded - it is never stored.
About this tool
Proper heading structure (a single H1, followed by logically nested H2s, H3s, etc.) helps both search engines and screen reader users understand a page's content hierarchy. This tool inspects a page's H1-H6 headings and flags structural issues, like a missing H1 or skipped heading levels.
How to use this tool
- Scan page HTMLAnalyze heading tags from H1 through H6 in source order.
- Review heading mapCheck hierarchy and sequence across sections of the page.
- Identify structure issuesFind missing H1, duplicate primaries, or skipped heading levels.
- Fix template/content blocksUpdate markup and rerun checker until structure is clean.
A good heading structure
Use one H1 that says what the page is about, then H2s for the main sections and H3s for points inside them - like a table of contents. Do not skip levels, such as jumping from H2 to H4, and do not use headings just to make text bigger; use CSS for styling.
Screen reader users jump between headings to scan a page, and search engines use them to understand its topics, so clear, descriptive headings help both.
Key features
- Improves content hierarchy clarity for SEO and accessibility.
- Highlights heading misuse that hurts readability and navigation.
- Fast audit for CMS templates and content teams.
- Supports cleaner screen-reader navigation experience.
Common uses
- Auditing blog/article templates for semantic consistency.
- Fixing heading issues reported in accessibility checks.
- Reviewing landing pages before SEO publication.
- Training content teams on proper heading structure.
Tips for better results
- Use one meaningful H1 per page for primary topic clarity.
- Follow sequential nesting (H2 then H3, avoid jumps).
- Keep headings descriptive rather than generic labels.
- Separate visual styling from semantic heading choice.
Mistakes to avoid
- Using heading levels only for font size styling.
- Skipping from H2 directly to H4 without hierarchy reason.
- Duplicating multiple unrelated H1 elements in content body.
- Leaving empty headings for spacing/layout hacks.
Frequently asked questions
Search engines use headings to understand what a page is about and how content is organized. Screen reader users often navigate directly by headings, so a logical, well-nested structure makes a page much easier to navigate non-visually.
Generally just one - the H1 should represent the main topic/title of the page, with H2s and lower levels breaking down subtopics beneath it.
It means jumping from, say, an H2 directly to an H4 without an H3 in between - this breaks the logical nesting hierarchy, which can confuse screen readers and make the content structure harder to follow.
The main topic of the page in the words your visitors use, close to - but not necessarily identical to - the title tag. Every page should have one clear H1.
No - use CSS for size. Headings tell screen readers and search engines how the page is organised, and using them for styling creates a confusing outline.
Many jump from heading to heading to scan a page, much as sighted readers skim. Descriptive headings in a logical order let them find the section they need quickly.