Heading Checker — Analyze HTML Heading Structure
Paste your HTML and instantly see the heading hierarchy, detect SEO issues, and fix structural problems. No sign-up required.
How to heading checker
- 1Paste your HTML code into the text area
- 2The tool automatically extracts and analyzes all heading tags (H1-H6)
- 3Review the heading tree to see the document structure at a glance
- 4Check for warnings like multiple H1 tags or skipped heading levels
- 5Use the count summary to verify heading distribution across levels
About This Tool
Proper heading structure is one of the fundamental elements of both SEO and web accessibility. Search engines use headings to understand the hierarchy and main topics of your content, while screen readers rely on them to help users navigate the page. A heading checker helps you catch common mistakes before they impact your rankings or user experience.
This tool parses your HTML and extracts every heading tag from H1 through H6. It displays them as an indented tree so you can instantly see the document structure. It also performs automated checks for common issues: multiple H1 tags (there should typically be only one), skipped heading levels (e.g., jumping from H1 to H3 without an H2), and headings that may be too long.
Issues are colour-coded — green for correct structure, yellow for warnings, and red for errors. All processing runs locally in your browser, so your HTML is never sent to any external server. This makes the tool safe for checking unpublished pages, client work, and confidential content.
Frequently Asked Questions
The H1 tag represents the main topic of the page. While HTML5 technically allows multiple H1 tags, SEO best practice is to have a single H1 that clearly describes the page's primary subject. Multiple H1 tags can dilute the topical focus and confuse search engines.
A skipped heading level occurs when you jump from one heading level to a non-sequential one, such as going from H1 to H3 without an H2 in between. This breaks the logical document outline and can cause accessibility issues for screen reader users.
There is no strict character limit for headings, but keeping them concise (under 70 characters) is a good practice. Headings should be descriptive enough to convey the section's topic but short enough to be easily scannable.
While headings are not a direct ranking factor in the same way as backlinks, Google has confirmed they help understand the structure and content of a page. A clear heading hierarchy improves content comprehension, which can indirectly benefit rankings.
Yes. The tool will extract heading tags from any HTML you paste, whether it is a complete page with DOCTYPE and body tags or just a fragment of content. Only H1 through H6 tags are analysed.