The Ultimate Technical SEO Audit Checklist for 2026

Introduction

A technical SEO audit is a systematic review of your website’s technical health — identifying issues that prevent Google from properly crawling, indexing, and ranking your pages. You don’t need to be a developer to do one. Here’s a practical, step-by-step checklist for conducting your own technical audit.

Step 1: Check Crawling and Indexation

Type ‘site:yourwebsite.com’ in Google to see how many of your pages are indexed. Compare this to your actual number of published pages — a big discrepancy signals indexing issues. Check your robots.txt file (yourwebsite.com/robots.txt) to ensure important pages aren’t accidentally blocked. Submit your XML sitemap to Google Search Console if you haven’t already.

Step 2: Identify and Fix Broken Pages

Use Screaming Frog (free up to 500 URLs) or Google Search Console’s Coverage report to find 404 errors (pages not found). Set up 301 redirects from broken URLs to relevant live pages. Broken pages waste crawl budget and create poor user experiences. A redirect tells Google and users where the content has moved.

Step 3: Check Site Speed and Core Web Vitals

Run your key pages through PageSpeed Insights. Fix the highest-impact issues first: compress and properly size images, enable browser caching, minify CSS and JavaScript, upgrade to faster hosting, implement a CDN. Focus especially on mobile speed — Google indexes the mobile version of your site.

Step 4: Audit Your Internal Linking

Crawl your website and look for: pages with no internal links pointing to them (orphan pages — Google may not discover or prioritise these), pages with broken internal links, and opportunities to add more internal links to important pages from relevant existing content. A well-structured internal linking architecture distributes page authority more effectively.

Step 5: Check for Duplicate Content and Canonical Issues

Duplicate content — the same content appearing at multiple URLs — confuses search engines about which version to rank. Common causes: HTTP vs HTTPS versions, www vs non-www, URL parameters, and pagination. Use canonical tags to specify the preferred URL. Ensure HTTPS is enforced with proper redirects. Run a crawl with Screaming Frog to identify duplicate title tags and meta descriptions.