The Technical SEO Audit Checklist for 2026
A technical SEO audit is the foundation of any successful SEO strategy. Without solid technical foundations, even the best content won't rank. This checklist covers everything you need to assess and fix.
Crawlability & Indexation
- Check robots.txt isn't blocking important pages
- Review XML sitemap for accuracy and submission to Google Search Console
- Identify and fix crawl errors in GSC
- Check for orphan pages (pages with no internal links)
- Ensure proper use of canonical tags
- Review noindex/nofollow directives
Core Web Vitals
Google's Core Web Vitals are a confirmed ranking factor. The three metrics to optimise:
- Largest Contentful Paint (LCP): Should be under 2.5 seconds. Optimise images, use CDN, and reduce server response time.
- Interaction to Next Paint (INP): Should be under 200ms. Minimise JavaScript execution and optimise event handlers.
- Cumulative Layout Shift (CLS): Should be under 0.1. Set explicit image dimensions and avoid dynamic content injection above the fold.
Pro Tip: Use PageSpeed Insights for lab data, but always check field data in Search Console for the real user experience. Lab data and field data can differ significantly.
Site Architecture
- Ensure a logical URL structure with clear hierarchy
- Keep important pages within 3 clicks of the homepage
- Implement breadcrumb navigation with schema markup
- Check for and fix redirect chains (more than one redirect hop)
- Audit internal linking to distribute authority effectively
Schema Markup
Structured data helps search engines understand your content and can earn rich snippets in search results. Priority schema types:
- Organization/LocalBusiness schema on the homepage
- BreadcrumbList on all pages
- Article/BlogPosting on blog content
- Product schema for e-commerce pages
- FAQ schema where applicable
Mobile & Security
- Full mobile responsiveness (Google uses mobile-first indexing)
- HTTPS across the entire site with proper SSL configuration
- No mixed content warnings
- Proper hreflang implementation for multi-language sites
Next Steps
Run through this checklist and prioritise fixes by impact. Technical issues that affect crawlability should be fixed first, followed by Core Web Vitals, then schema and architecture improvements.
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