Technical SEO Audit Checklist: 40 Checks Every Website Needs in 2026

Great content cannot rank if search engines cannot reach it, render it or understand it. A technical SEO audit finds the hidden problems that hold a site back: pages accidentally blocked, duplicates competing with each other, redirects that loop and templates that load slowly. Work through these forty checks in order, and fix what blocks indexing before anything else.

#What do you need before you start?

Access and a crawl. You will need Google Search Console, analytics, a site crawler, PageSpeed Insights and a list of your most valuable pages (top traffic and top converting). Crawl the whole site and keep the export as your working document.

#Crawling: can search engines reach your pages?

1. robots.txt does not block important sections or resources (CSS, JS)
2. An XML sitemap exists, lists only indexable canonical URLs and is submitted in Search Console
3. Important pages are reachable within a few clicks from the homepage
4. No orphan pages: every valuable page has internal links pointing to it
5. Server responds reliably, without frequent timeouts or 5xx errors

#Indexing: are the right pages in Google?

6. Important pages are indexed (check Search Console page indexing)
7. No accidental noindex tags on valuable templates
8. Canonical tags point to the correct, preferred URL
9. Thin, duplicate or utility pages are kept out of the index where appropriate
10. Parameter and filter URLs do not create thousands of indexable duplicates
11. Pages render correctly for Google, including content loaded by JavaScript

#Site structure and internal links: is authority flowing?

12. A logical hierarchy: home, categories or services, then detail pages
13. Descriptive, readable URLs
14. Breadcrumbs on deeper pages
15. Contextual internal links between related topics
16. Anchor text that describes the destination

#Redirects and errors: is anything broken?

17. No internal links to 404 pages
18. Old URLs redirect with a single 301 to the best equivalent
19. No redirect chains or loops
20. A helpful custom 404 page
21. HTTP redirects to HTTPS, and one preferred hostname (with or without www)

#Speed and Core Web Vitals: is the site fast for real users?

22. Largest Contentful Paint is good on key templates
23. Interaction to Next Paint is good, with no heavy script blocking taps
24. Cumulative Layout Shift is low, with dimensions set on media
25. Images are compressed, modern formats, sized for the screen
26. Unused scripts and plugins are removed or deferred

Our Core Web Vitals guide explains each metric in plain English.

#Mobile: does it work on phones?

27. Responsive layout with no sideways scrolling
28. Readable text without zooming
29. Tap targets large enough and well spaced
30. Content is the same on mobile and desktop

#Structured data: does Google understand the page?

31. Organization and website schema on the homepage
32. Breadcrumb schema on deeper pages
33. Article, Product, Service, FAQ or LocalBusiness schema where relevant
34. No errors or warnings in structured data testing
35. Facts in schema match what is visible on the page

Structured data also helps AI systems understand your brand. See how to appear in Google AI Overviews.

#International and content signals: are you targeting the right audience?

36. hreflang tags are correct if you run multiple languages or regions
37. Unique title tags and meta descriptions on every indexable page
38. One clear H1 per page that matches its topic

#Security and trust: is the site safe?

39. Valid HTTPS everywhere, with no mixed content
40. No malware, spam or hacked pages flagged in Search Console

#How should you prioritise the findings?

#Want an expert audit?

Our technical SEO audits come with a prioritised fix list, and our developers can implement the fixes, not just report them. Explore our SEO services, read about redesigning without losing SEO, or request an audit.