About HTML Structure
Use HTML Structure to Analyze headings and links. The tool runs in your browser for fast results and keeps your data local.
How to Use
- 1. Add your input or data.
- 2. Adjust options if needed.
- 3. Review the result and copy it.
What is HTML Structure Analysis?
HTML structure analysis examines the semantic organization of a webpage, including heading hierarchy (H1-H6), internal and external links, image alt attributes, and overall document structure. Proper HTML structure is essential for SEO, accessibility, and user experience. Search engines use heading hierarchy to understand content organization and importance. The H1 tag should be unique and describe the main topic, while H2-H6 tags create logical subsections. Internal links help search engines discover pages and distribute page authority. External links provide context and credibility. Alt attributes make images accessible to screen readers and provide SEO value.
Common Use Cases
HTML structure analysis is essential for SEO audits and accessibility compliance. SEO specialists audit heading hierarchy to ensure proper content organization. Web developers verify semantic HTML structure before launch. Accessibility auditors check for missing alt attributes and proper heading order. Content editors ensure articles have logical heading structure. E-commerce sites verify product pages have proper H1 tags and internal links. Migration projects validate HTML structure is preserved. Technical SEO audits identify structural issues affecting rankings.
- SEO audit heading hierarchy verification
- Semantic HTML structure validation
- Accessibility alt attribute checking
- Article logical heading structure
- E-commerce product page H1 validation
- Migration HTML structure preservation
- Technical SEO structural issue identification
- Internal linking strategy analysis
Best Practices & Tips
Use one H1 tag per page describing the main topic. Follow logical heading hierarchy—do not skip levels (H1→H2→H3, not H1→H3). Include descriptive alt attributes for all images—leave empty for decorative images. Use internal links to connect related content and distribute page authority. External links should open in new tabs and use rel="noopener" for security. Ensure heading text is descriptive and includes keywords naturally. Avoid excessive heading tags—use them for structure, not styling. Validate HTML structure with W3C validator. Use semantic HTML5 elements (article, section, nav) for better structure.
- One H1 tag per page describing main topic
- Logical heading hierarchy—no skipped levels
- Descriptive alt attributes for all images
- Internal links for related content and authority
- External links with rel="noopener" for security
- Descriptive heading text with natural keywords
- Avoid excessive headings—structure not styling
- Validate with W3C HTML validator
- Use semantic HTML5 elements (article, section)
Troubleshooting Common Issues
If multiple H1 tags exist, consolidate to one main heading per page. If heading hierarchy is broken, reorder headings to follow logical structure (H1→H2→H3). If alt attributes are missing, add descriptive text for all content images. If internal links are broken, verify URLs and fix 404 errors. If external links are insecure, add rel="noopener noreferrer" for security. If headings are used for styling, replace with CSS and proper semantic tags. If heading text is not descriptive, rewrite with keywords and clear meaning. If HTML validation fails, fix syntax errors and unclosed tags.
- Multiple H1 tags reducing SEO effectiveness
- Broken heading hierarchy confusing search engines
- Missing alt attributes failing accessibility
- Broken internal links causing 404 errors
- Insecure external links without rel attributes
- Headings used for styling instead of structure
- Non-descriptive heading text lacking keywords
- HTML validation errors from syntax issues
Frequently Asked Questions
Is HTML Structure free to use?
Yes. HTML Structure is free and works directly in your browser.
Does HTML Structure upload my data?
No. Most processing happens locally. Any network requests are clearly indicated.
What formats does HTML Structure support?
HTML Structure supports the common formats described on the page. Convert uncommon formats before pasting.
How should I share results from HTML Structure?
Copy the output and review any sensitive data before sharing or publishing.