Quick answer
Technical SEO makes sure search engines and AI tools can crawl, understand and index your site. Work through crawling, indexing, speed, mobile and structured data in that order.
Last updated: October 2026
Use this checklist for a quick technical health check. Fix anything you cannot tick.
Crawling and indexing
- ☐ robots.txt is not blocking important pages
- ☐ XML sitemap submitted in Google Search Console
- ☐ No important pages set to noindex
- ☐ No orphan pages: every page has internal links
- ☐ Redirects are 301 and avoid chains
- ☐ Canonical tags point to the preferred URL
Speed and mobile
- ☐ Core Web Vitals pass for key pages
- ☐ Images compressed and lazy-loaded
- ☐ Caching and a CDN enabled
- ☐ Mobile layout tested on real devices
Security and structure
- ☐ Site fully on HTTPS with no mixed content
- ☐ Clean, descriptive URLs
- ☐ Breadcrumbs and logical site structure
- ☐ Schema markup valid (Organization, Article, FAQ, LocalBusiness)
- ☐ No broken links or 404s in important paths
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Frequently asked questions
How often should I run a technical SEO check?
Run a quick check monthly and a full audit every 6 to 12 months, or after any redesign or migration.
What tools do I need?
Google Search Console, PageSpeed Insights and a crawler such as Screaming Frog cover most checks.
