Set canonical URLs for all pages
SkillWeb & browsingChecks that pages declare a canonical URL correctly when auditing SEO metadata and indexability.
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 Set canonical URLs for all pages skill
About this capability
Use when auditing metadata, crawlability, structured data, or indexability related to Set canonical URLs for all pages. 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/canonical-url/SKILL.md and read by ahel’s review.
Duplicate content from URL parameters, www vs non-www, or pagination dilutes ranking signals—canonical tags consolidate these signals to the preferred URL.
Quick Reference
- Canonical URLs tell search engines which version of a page to index
- Prevents duplicate content penalties from URL variations
- Use absolute URLs including protocol and domain
- Self-referencing canonicals are a best practice
Check
Verify that this page has a canonical URL tag and that it points to the correct preferred version.
Fix
Add or correct the canonical URL tag in the head section to prevent duplicate content issues.
Explain
Explain how canonical URLs help search engines understand the preferred version of duplicate or similar pages.
Code Review
Review metadata generation, rendered HTML, structured data, and response headers related to Set canonical URLs for all pages. 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/canonical-url
Signals
- GitHub stars
- 74k
- Forks
- 7k
- Last commit
- Aug 2026
Advanced
- Catalog kind
- skill
- Gateway key
canonical-url- Source
- github.com/thedaviddias/front-end-checklist