technical-seo-checkerPerforms technical SEO audits covering site speed, crawlability, indexability, mobile-friendliness, security, and structured data. Identifies technical issue...
Install via ClawdBot CLI:
clawdbot install aaron-he-zhu/technical-seo-checkerSEO & GEO Skills Library · 20 skills for SEO + GEO · Install all: npx skills add aaron-he-zhu/seo-geo-claude-skills
Research · keyword-research · competitor-analysis · serp-analysis · content-gap-analysis
Build · seo-content-writer · geo-content-optimizer · meta-tags-optimizer · schema-markup-generator
Optimize · on-page-seo-auditor · technical-seo-checker · internal-linking-optimizer · content-refresher
Monitor · rank-tracker · backlink-analyzer · performance-reporter · alert-manager
Cross-cutting · content-quality-auditor · domain-authority-auditor · entity-optimizer · memory-management
This skill performs comprehensive technical SEO audits to identify issues that may prevent search engines from properly crawling, indexing, and ranking your site.
Perform a technical SEO audit for [URL/domain]Check Core Web Vitals for [URL]Audit crawlability and indexability for [domain]Technical SEO checklist for migrating [old domain] to [new domain]See CONNECTORS.md for tool category placeholders.
With ~~web crawler + ~~page speed tool + ~~CDN connected:
Claude can automatically crawl the entire site structure via ~~web crawler, pull Core Web Vitals and performance metrics from ~~page speed tool, analyze caching headers from ~~CDN, and fetch mobile-friendliness data. This enables comprehensive automated technical audits.
With manual data only:
Ask the user to provide:
Proceed with the full audit using provided data. Note in the output which findings are from automated crawl vs. manual review.
When a user requests a technical SEO audit:
## Crawlability Analysis
### Robots.txt Review
**URL**: [domain]/robots.txt
**Status**: [Found/Not Found/Error]
**Current Content**:[robots.txt content]
| Check | Status | Notes |
|-------|--------|-------|
| File exists | ✅/❌ | [notes] |
| Valid syntax | ✅/⚠️/❌ | [errors found] |
| Sitemap declared | ✅/❌ | [sitemap URL] |
| Important pages blocked | ✅/⚠️/❌ | [blocked paths] |
| Assets blocked | ✅/⚠️/❌ | [CSS/JS blocked?] |
| Correct user-agents | ✅/⚠️/❌ | [notes] |
**Issues Found**:
- [Issue 1]
- [Issue 2]
**Recommended robots.txt**:User-agent: *
Allow: /
Disallow: /admin/
Disallow: /private/
Sitemap: https://example.com/sitemap.xml
---
### XML Sitemap Review
**Sitemap URL**: [URL]
**Status**: [Found/Not Found/Error]
| Check | Status | Notes |
|-------|--------|-------|
| Sitemap exists | ✅/❌ | [notes] |
| Valid XML format | ✅/⚠️/❌ | [errors] |
| In robots.txt | ✅/❌ | [notes] |
| Submitted to ~~search console | ✅/⚠️/❌ | [notes] |
| URLs count | [X] | [appropriate?] |
| Only indexable URLs | ✅/⚠️/❌ | [notes] |
| Includes priority | ✅/⚠️ | [notes] |
| Includes lastmod | ✅/⚠️ | [accurate?] |
**Issues Found**:
- [Issue 1]
---
### Crawl Budget Analysis
| Factor | Status | Impact |
|--------|--------|--------|
| Crawl errors | [X] errors | [Low/Med/High] |
| Duplicate content | [X] pages | [Low/Med/High] |
| Thin content | [X] pages | [Low/Med/High] |
| Redirect chains | [X] found | [Low/Med/High] |
| Orphan pages | [X] found | [Low/Med/High] |
**Crawlability Score**: [X]/10
## Indexability Analysis
### Index Status Overview
| Metric | Count | Notes |
|--------|-------|-------|
| Pages in sitemap | [X] | |
| Pages indexed | [X] | [source: site: search] |
| Index coverage ratio | [X]% | [good if >90%] |
### Index Blockers Check
| Blocker Type | Found | Pages Affected |
|--------------|-------|----------------|
| noindex meta tag | [X] | [list or "none"] |
| noindex X-Robots | [X] | [list or "none"] |
| Robots.txt blocked | [X] | [list or "none"] |
| Canonical to other | [X] | [list or "none"] |
| 4xx/5xx errors | [X] | [list or "none"] |
| Redirect loops | [X] | [list or "none"] |
### Canonical Tags Audit
| Check | Status | Notes |
|-------|--------|-------|
| Canonicals present | ✅/⚠️/❌ | [X]% of pages |
| Self-referencing | ✅/⚠️/❌ | [notes] |
| Consistent (HTTP/HTTPS) | ✅/⚠️/❌ | [notes] |
| Consistent (www/non-www) | ✅/⚠️/❌ | [notes] |
| No conflicting signals | ✅/⚠️/❌ | [notes] |
### Duplicate Content Issues
| Issue Type | Count | Examples |
|------------|-------|----------|
| Exact duplicates | [X] | [URLs] |
| Near duplicates | [X] | [URLs] |
| Parameter duplicates | [X] | [URLs] |
| WWW/non-WWW | [X] | [notes] |
| HTTP/HTTPS | [X] | [notes] |
**Indexability Score**: [X]/10
## Performance Analysis
### Core Web Vitals
| Metric | Mobile | Desktop | Target | Status |
|--------|--------|---------|--------|--------|
| LCP (Largest Contentful Paint) | [X]s | [X]s | <2.5s | ✅/⚠️/❌ |
| FID (First Input Delay) | [X]ms | [X]ms | <100ms | ✅/⚠️/❌ |
| CLS (Cumulative Layout Shift) | [X] | [X] | <0.1 | ✅/⚠️/❌ |
| INP (Interaction to Next Paint) | [X]ms | [X]ms | <200ms | ✅/⚠️/❌ |
### Additional Performance Metrics
| Metric | Value | Status |
|--------|-------|--------|
| Time to First Byte (TTFB) | [X]ms | ✅/⚠️/❌ |
| First Contentful Paint (FCP) | [X]s | ✅/⚠️/❌ |
| Speed Index | [X] | ✅/⚠️/❌ |
| Total Blocking Time | [X]ms | ✅/⚠️/❌ |
| Page Size | [X]MB | ✅/⚠️/❌ |
| Requests | [X] | ✅/⚠️/❌ |
### Performance Issues
**LCP Issues**:
- [Issue]: [Impact] - [Solution]
- [Issue]: [Impact] - [Solution]
**CLS Issues**:
- [Issue]: [Impact] - [Solution]
**Resource Loading**:
| Resource Type | Count | Size | Issues |
|---------------|-------|------|--------|
| Images | [X] | [X]MB | [notes] |
| JavaScript | [X] | [X]MB | [notes] |
| CSS | [X] | [X]KB | [notes] |
| Fonts | [X] | [X]KB | [notes] |
### Optimization Recommendations
**High Impact**:
1. [Recommendation] - Est. improvement: [X]s
2. [Recommendation] - Est. improvement: [X]s
**Medium Impact**:
1. [Recommendation]
2. [Recommendation]
**Performance Score**: [X]/10
## Mobile Optimization Analysis
### Mobile-Friendly Test
| Check | Status | Notes |
|-------|--------|-------|
| Mobile-friendly overall | ✅/❌ | [notes] |
| Viewport configured | ✅/❌ | [viewport tag] |
| Text readable | ✅/⚠️/❌ | Font size: [X]px |
| Tap targets sized | ✅/⚠️/❌ | [notes] |
| Content fits viewport | ✅/❌ | [notes] |
| No horizontal scroll | ✅/❌ | [notes] |
### Responsive Design Check
| Element | Desktop | Mobile | Issues |
|---------|---------|--------|--------|
| Navigation | [status] | [status] | [notes] |
| Images | [status] | [status] | [notes] |
| Forms | [status] | [status] | [notes] |
| Tables | [status] | [status] | [notes] |
| Videos | [status] | [status] | [notes] |
### Mobile-First Indexing
| Check | Status | Notes |
|-------|--------|-------|
| Mobile version has all content | ✅/⚠️/❌ | [notes] |
| Mobile has same structured data | ✅/⚠️/❌ | [notes] |
| Mobile has same meta tags | ✅/⚠️/❌ | [notes] |
| Mobile images have alt text | ✅/⚠️/❌ | [notes] |
**Mobile Score**: [X]/10
## Security Analysis
### HTTPS Status
| Check | Status | Notes |
|-------|--------|-------|
| SSL certificate valid | ✅/❌ | Expires: [date] |
| HTTPS enforced | ✅/❌ | [redirects properly?] |
| Mixed content | ✅/⚠️/❌ | [X] issues |
| HSTS enabled | ✅/⚠️ | [notes] |
| Certificate chain | ✅/⚠️/❌ | [notes] |
### Security Headers
| Header | Present | Value | Recommended |
|--------|---------|-------|-------------|
| Content-Security-Policy | ✅/❌ | [value] | [recommendation] |
| X-Frame-Options | ✅/❌ | [value] | DENY or SAMEORIGIN |
| X-Content-Type-Options | ✅/❌ | [value] | nosniff |
| X-XSS-Protection | ✅/❌ | [value] | 1; mode=block |
| Referrer-Policy | ✅/❌ | [value] | [recommendation] |
**Security Score**: [X]/10
## URL Structure Analysis
### URL Pattern Review
| Check | Status | Notes |
|-------|--------|-------|
| HTTPS URLs | ✅/⚠️/❌ | [X]% HTTPS |
| Lowercase URLs | ✅/⚠️/❌ | [notes] |
| No special characters | ✅/⚠️/❌ | [notes] |
| Readable/descriptive | ✅/⚠️/❌ | [notes] |
| Appropriate length | ✅/⚠️/❌ | Avg: [X] chars |
| Keywords in URLs | ✅/⚠️/❌ | [notes] |
| Consistent structure | ✅/⚠️/❌ | [notes] |
### URL Issues Found
| Issue Type | Count | Examples |
|------------|-------|----------|
| Dynamic parameters | [X] | [URLs] |
| Session IDs in URLs | [X] | [URLs] |
| Uppercase characters | [X] | [URLs] |
| Special characters | [X] | [URLs] |
| Very long URLs (>100) | [X] | [URLs] |
### Redirect Analysis
| Check | Status | Notes |
|-------|--------|-------|
| Redirect chains | [X] found | [max chain length] |
| Redirect loops | [X] found | [URLs] |
| 302 → 301 needed | [X] found | [URLs] |
| Broken redirects | [X] found | [URLs] |
**URL Score**: [X]/10> CORE-EEAT alignment: Schema markup quality maps to O05 (Schema Markup) in the CORE-EEAT benchmark. See content-quality-auditor for full content quality audit.
## Structured Data Analysis
### Schema Markup Found
| Schema Type | Pages | Valid | Errors |
|-------------|-------|-------|--------|
| [Type 1] | [X] | ✅/❌ | [errors] |
| [Type 2] | [X] | ✅/❌ | [errors] |
### Validation Results
**Errors**:
- [Error 1]: [affected pages] - [solution]
- [Error 2]: [affected pages] - [solution]
**Warnings**:
- [Warning 1]: [notes]
### Missing Schema Opportunities
| Page Type | Current Schema | Recommended |
|-----------|----------------|-------------|
| Blog posts | [current] | Article + FAQ |
| Products | [current] | Product + Review |
| Homepage | [current] | Organization |
**Structured Data Score**: [X]/10
## International SEO Analysis
### Hreflang Implementation
| Check | Status | Notes |
|-------|--------|-------|
| Hreflang tags present | ✅/❌ | [notes] |
| Self-referencing | ✅/⚠️/❌ | [notes] |
| Return tags present | ✅/⚠️/❌ | [notes] |
| Valid language codes | ✅/⚠️/❌ | [notes] |
| x-default tag | ✅/⚠️ | [notes] |
### Language/Region Targeting
| Language | URL | Hreflang | Status |
|----------|-----|----------|--------|
| [en-US] | [URL] | [tag] | ✅/⚠️/❌ |
| [es-ES] | [URL] | [tag] | ✅/⚠️/❌ |
**International Score**: [X]/10
# Technical SEO Audit Report
**Domain**: [domain]
**Audit Date**: [date]
**Pages Analyzed**: [X]
## Overall Technical Health: [X]/100Score Breakdown:
████████░░ Crawlability: 8/10
███████░░░ Indexability: 7/10
█████░░░░░ Performance: 5/10
████████░░ Mobile: 8/10
█████████░ Security: 9/10
██████░░░░ URL Structure: 6/10
█████░░░░░ Structured Data: 5/10
## Critical Issues (Fix Immediately)
1. **[Issue]**: [Impact]
- Affected: [pages/scope]
- Solution: [specific fix]
- Priority: 🔴 Critical
2. **[Issue]**: [Impact]
- Affected: [pages/scope]
- Solution: [specific fix]
- Priority: 🔴 Critical
## High Priority Issues
1. **[Issue]**: [Solution]
2. **[Issue]**: [Solution]
## Medium Priority Issues
1. **[Issue]**: [Solution]
2. **[Issue]**: [Solution]
## Quick Wins
These can be fixed quickly for immediate improvement:
1. [Quick fix 1]
2. [Quick fix 2]
3. [Quick fix 3]
## Implementation Roadmap
### Week 1: Critical Fixes
- [ ] [Task 1]
- [ ] [Task 2]
### Week 2-3: High Priority
- [ ] [Task 1]
- [ ] [Task 2]
### Week 4+: Optimization
- [ ] [Task 1]
- [ ] [Task 2]
## Monitoring Recommendations
Set up alerts for:
- Core Web Vitals drops
- Crawl error spikes
- Index coverage changes
- Security issuesUser: "Check the technical SEO of cloudhosting.com"
Output:
# Technical SEO Audit Report
**Domain**: cloudhosting.com
**Audit Date**: 2024-09-15
**Pages Analyzed**: 312
## Crawlability Analysis
### Robots.txt Review
**URL**: cloudhosting.com/robots.txt
**Status**: Found
| Check | Status | Notes |
|-------|--------|-------|
| File exists | ✅ | 200 response |
| Valid syntax | ⚠️ | Wildcard pattern `Disallow: /*?` too aggressive — blocks faceted pages |
| Sitemap declared | ❌ | No Sitemap directive in robots.txt |
| Important pages blocked | ⚠️ | /pricing/ blocked by `Disallow: /pricing` rule |
| Assets blocked | ✅ | CSS/JS accessible |
**Issues Found**:
- Sitemap URL not declared in robots.txt
- `/pricing/` inadvertently blocked — high-value commercial page
### XML Sitemap Review
**Sitemap URL**: cloudhosting.com/sitemap.xml
**Status**: Found (not referenced in robots.txt)
| Check | Status | Notes |
|-------|--------|-------|
| Sitemap exists | ✅ | Valid XML, 287 URLs |
| Only indexable URLs | ❌ | 23 noindex URLs included |
| Includes lastmod | ⚠️ | All dates set to 2023-01-01 — not accurate |
**Crawlability Score**: 5/10
## Performance Analysis
### Core Web Vitals
| Metric | Mobile | Desktop | Target | Status |
|--------|--------|---------|--------|--------|
| LCP (Largest Contentful Paint) | 4.8s | 2.1s | <2.5s | ❌ Mobile / ✅ Desktop |
| FID (First Input Delay) | 45ms | 12ms | <100ms | ✅ / ✅ |
| CLS (Cumulative Layout Shift) | 0.24 | 0.08 | <0.1 | ❌ Mobile / ✅ Desktop |
| INP (Interaction to Next Paint) | 380ms | 140ms | <200ms | ❌ Mobile / ✅ Desktop |
### Additional Performance Metrics
| Metric | Value | Status |
|--------|-------|--------|
| Time to First Byte (TTFB) | 1,240ms | ❌ |
| Page Size | 3.8MB | ❌ |
| Requests | 94 | ⚠️ |
**LCP Issues**:
- Uncompressed hero image (2.4MB PNG): Convert to WebP, est. save 1.9MB
- No CDN detected: TTFB 1,240ms from origin server
**CLS Issues**:
- Ad banner at top of page injects without reserved height (0.18 shift contribution)
**Performance Score**: 3/10
## Security Analysis
### HTTPS Status
| Check | Status | Notes |
|-------|--------|-------|
| SSL certificate valid | ✅ | Expires: 2025-03-22 |
| HTTPS enforced | ⚠️ | http://cloudhosting.com returns 200 instead of 301 redirect |
| Mixed content | ❌ | 7 images loaded over HTTP on /features/ page |
| HSTS enabled | ❌ | Header not present |
**Security Score**: 5/10
## Structured Data Analysis
### Schema Markup Found
| Schema Type | Pages | Valid | Errors |
|-------------|-------|-------|--------|
| Organization | 1 (homepage) | ✅ | None |
| Article | 0 | — | Missing on 48 blog posts |
| Product | 0 | — | Missing on 5 plan pages |
| FAQ | 0 | — | Missing on 12 pages with FAQ content |
**Structured Data Score**: 3/10
## Overall Technical Health: 42/100Score Breakdown:
█████░░░░░ Crawlability: 5/10
██████░░░░ Indexability: 6/10
███░░░░░░░ Performance: 3/10
██████░░░░ Mobile: 6/10
█████░░░░░ Security: 5/10
██████░░░░ URL Structure: 6/10
███░░░░░░░ Structured Data: 3/10
## Priority Issues
### 🔴 Critical (Fix Immediately)
1. **Mobile LCP 4.8s (target <2.5s)** — Compress hero image to WebP (est. save 1.9MB) and implement a CDN to reduce TTFB from 1,240ms to <400ms.
### 🟡 Important (Fix Soon)
2. **HTTP not redirecting to HTTPS** — Add 301 redirect from http:// to https:// and enable HSTS header. 7 mixed-content images on /features/ need URL updates.
### 🟢 Minor (Optimize)
3. **No Article/FAQ schema on blog posts** — Add Article schema to 48 blog posts and FAQ schema to 12 FAQ pages for rich result eligibility.### Crawlability
- [ ] robots.txt is valid and not blocking important content
- [ ] XML sitemap exists and is submitted to ~~search console
- [ ] No crawl errors in ~~search console
- [ ] No redirect chains or loops
### Indexability
- [ ] Important pages are indexable
- [ ] Canonical tags are correct
- [ ] No duplicate content issues
- [ ] Pagination is handled correctly
### Performance
- [ ] Core Web Vitals pass
- [ ] Page speed under 3 seconds
- [ ] Images are optimized
- [ ] JS/CSS are minified
### Mobile
- [ ] Mobile-friendly test passes
- [ ] Viewport is configured
- [ ] Touch elements are properly sized
### Security
- [ ] HTTPS is enforced
- [ ] SSL certificate is valid
- [ ] No mixed content
- [ ] Security headers present
### Structure
- [ ] URLs are clean and descriptive
- [ ] Site architecture is logical
- [ ] Internal linking is strong| Severity | Impact Description | Examples | Response Time |
|----------|-------------------|---------|---------------|
| Critical | Prevents indexation or causes site-wide issues | Robots.txt blocking site, noindex on key pages, site-wide 500 errors | Same day |
| High | Significantly impacts rankings or user experience | Slow page speed, missing hreflang, duplicate content, redirect chains | Within 1 week |
| Medium | Affects specific pages or has moderate impact | Missing schema, suboptimal canonicals, thin content pages | Within 1 month |
| Low | Minor optimization opportunities | Image compression, minor CLS issues, non-essential schema missing | Next quarter |
| Factor | Weight | Assessment |
|--------|--------|-----------|
| Pages affected | 30% | Site-wide > Section > Single page |
| Revenue impact | 25% | Revenue pages > Blog > Utility pages |
| Fix difficulty | 20% | Config change < Template change < Code rewrite |
| Competitive impact | 15% | Competitors passing you > parity > you ahead |
| Crawl budget waste | 10% | High waste > Moderate > Minimal |
| Root Cause | Detection | Fix |
|-----------|-----------|-----|
| Large hero image | PageSpeed Insights | Serve WebP, resize to container, add loading="lazy" |
| Render-blocking CSS/JS | DevTools Coverage | Defer non-critical, inline critical CSS |
| Slow server response | TTFB >800ms | CDN, server-side caching, upgrade hosting |
| Third-party scripts | DevTools Network | Defer/async, use facade pattern |
| Root Cause | Detection | Fix |
|-----------|-----------|-----|
| Images without dimensions | DevTools | Add explicit width/height attributes |
| Ads/embeds without reserved space | Visual inspection | Set min-height on containers |
| Web fonts causing FOUT | DevTools | font-display: swap + preload fonts |
| Dynamic content injection | Visual inspection | Reserve space with CSS |
| Root Cause | Detection | Fix |
|-----------|-----------|-----|
| Long JavaScript tasks | DevTools Performance | Break into smaller tasks, use requestIdleCallback |
| Heavy event handlers | DevTools | Debounce/throttle, use passive listeners |
| Main thread blocking | DevTools | Web workers for heavy computation |
Generated Mar 1, 2026
Before launching a new e-commerce site, use this skill to audit crawlability and indexability to ensure all product pages are discoverable by search engines. It checks site speed and mobile-friendliness to optimize user experience and Core Web Vitals for better rankings.
When a news website experiences ranking drops, this skill diagnoses crawl issues and site speed problems that may affect indexing of timely content. It reviews security and structured data to maintain visibility in search results.
During migration from an old domain to a new one, use this skill for a pre-migration audit to identify technical issues like redirects and URL structure. It ensures smooth transition by checking indexability and mobile optimization.
For a local business with a slow website, this skill audits mobile-friendliness and Core Web Vitals to improve local search performance. It checks crawlability to ensure Google can index the site properly for location-based queries.
Perform regular technical SEO audits on a SaaS platform to monitor site speed and security headers, preventing indexing problems. It reviews structured data and international SEO elements to maintain global search presence.
Agencies use this skill to provide technical audit services to clients, identifying issues like crawl errors and slow page speeds. It helps generate reports and recommendations, driving revenue through consulting and implementation fees.
E-commerce businesses integrate this skill to self-audit their sites, improving search rankings and sales by fixing technical SEO issues. It reduces bounce rates through better site speed and mobile optimization, boosting conversion rates.
Publishers leverage this skill to ensure articles and media are indexed quickly by addressing crawlability and Core Web Vitals. It enhances ad revenue by maintaining high site performance and search visibility for traffic-driven content.
💬 Integration Tip
Connect with web crawler and page speed tools for automated audits, or manually provide data like robots.txt and sitemap URLs for comprehensive analysis.
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