Fix malformed HTML structure
SkillWeb & browsingLets your agent audit web pages for malformed HTML, metadata, and crawlability issues.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the Fix malformed HTML structure skill
About this capability
Use when auditing metadata, crawlability, structured data, or indexability related to Fix malformed HTML structure. Verify the rendered HTML and HTTP response rather than relying only on source files.
What this skill tells your AI
The instructions your AI receives, as published by thedaviddias/front-end-checklist in skills/broken-html/SKILL.md and read by ahel’s review.
Malformed HTML can cause rendering issues across browsers and may prevent search engine crawlers from accurately parsing and indexing your content.
Quick Reference
- Ensure all HTML tags are properly closed and nested according to specifications
- Remove stray tags or unescaped characters from the source code
- Verify the document structure follows a logical hierarchy with valid head and body sections
Check
Validate the HTML structure of the page to identify any unclosed tags, incorrect nesting, or structural errors.
Fix
Correct the malformed HTML by properly closing tags and ensuring all elements are nested according to the HTML5 specification.
Explain
Explain how significant HTML errors can impact search engine bot crawling and the accessibility of a website.
Code Review
Review metadata generation, rendered HTML, structured data, and response headers related to Fix malformed HTML structure. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/seo/broken-html
Signals
- GitHub stars
- 74k
- Forks
- 7k
- Last commit
- Aug 2026
Advanced
- Catalog kind
- skill
- Gateway key
broken-html- Source
- github.com/thedaviddias/front-end-checklist