Great content can’t rank if search engines can’t find, crawl and understand it. A technical SEO audit checks the foundation of your website: whether Google can reach your pages, which ones it indexes, how fast they load and how clearly they are structured.
You don’t need to be a developer to run the first pass. Most checks below use free tools like Google Search Console and PageSpeed Insights. What matters is knowing what to look for and which problems to fix first.
Why a technical SEO audit comes first
When traffic stalls, many businesses publish more posts or chase more links. That can help, but not if a stray noindex tag, a blocked folder or a broken redirect is quietly holding back your best pages.
An audit gives you a prioritized to-do list based on which issues affect the most valuable pages, like service pages and product categories. It is one part of a complete search engine optimization strategy, and it makes every other part work better.
Crawling and indexing checks
These checks answer the basic question: can Google find your pages and add them to its index?
1. Crawlability and robots.txt
Your robots.txt file tells crawlers which parts of your site they may visit. Look for rules that block important folders, CSS or JavaScript files, or the whole site. A “Disallow: /” left over from a staging site is a common and costly mistake.
Robots.txt controls crawling, not indexing. To keep a page out of results, use a noindex tag, and don’t block that page from crawling or Google will never see the tag.
2. XML sitemaps
Your sitemap should be submitted in Search Console and list only live, indexable URLs that return a 200 status. Sitemaps full of redirects, 404s or noindexed pages send mixed signals.
3. Indexing in Google Search Console
The Page indexing report shows which pages are indexed and why others aren’t, with reasons like “Crawled, currently not indexed” or “Excluded by noindex tag”. Not every excluded page is a problem. Focus on pages that should rank but don’t, and check them with the URL Inspection tool.
4. Canonical tags
A canonical tag tells Google which version of a page is the main one. Indexable pages should usually point to themselves. Watch for canonicals pointing to the wrong page, a redirected URL or the homepage sitewide, which can happen after a theme or plugin change.
5. Redirects and 404 errors
Permanent moves should use 301 redirects straight to the final URL. Chains and loops slow crawling and waste link value. Fix broken internal links, and redirect old URLs that still have backlinks or traffic to the most relevant live page, not automatically to the homepage.
6. HTTPS
Every page should load over HTTPS, with HTTP redirecting to it. Check for mixed content, where a secure page loads images or scripts over HTTP, and make sure one version of your domain (www or non-www) redirects to the other.
Speed and user experience checks
Slow or unstable pages lose visitors no matter how they rank, and Google considers page experience.
7. Core Web Vitals (LCP, INP, CLS)
Core Web Vitals measure real user experience. Google describes good scores this way:
- Largest Contentful Paint (LCP): main content loads within 2.5 seconds.
- Interaction to Next Paint (INP): the page responds to taps and clicks within 200 milliseconds. INP replaced First Input Delay in 2024.
- Cumulative Layout Shift (CLS): 0.1 or less, so content doesn’t jump around as it loads.
Use the Core Web Vitals report in Search Console for real-visitor data across page groups, and PageSpeed Insights to diagnose individual URLs.
8. Mobile usability
Google primarily uses the mobile version of your site for indexing and ranking. Test key pages on real phones: text should be readable without zooming, buttons easy to tap and nothing spilling off the screen. The mobile version should include the same important content and structured data as desktop.
9. Page speed and images
Images are often the heaviest part of a page. Look for oversized files, missing width and height attributes, and images not compressed or served in modern formats like WebP or AVIF. Lazy-load images below the fold, but not your main hero image.
Also review render-blocking scripts, excess plugins, slow hosting and caching. On WordPress, a lean theme and solid caching make a real difference, and our WordPress development team handles this kind of performance work.
Content and structure checks
These checks help search engines understand what each page is about and how pages relate.
10. Structured data
Structured data (schema markup) labels details like your business name, address, products and articles. Common types include Organization, LocalBusiness, Product, Article and BreadcrumbList. Validate with Google’s Rich Results Test and mark up only content visible on the page. Valid markup makes a page eligible for rich results, but Google decides whether to show them.
11. Internal linking and orphan pages
Internal links help Google discover pages and judge which matter most. An orphan page has no internal links pointing to it. Compare your crawl with your sitemap to find them, then link key pages from navigation, related posts and category pages using descriptive anchor text.
12. Duplicate content
Duplicate pages split ranking signals. Common causes include URL parameters, HTTP and HTTPS versions, and location pages that only swap the city name. Fix them with canonicals, redirects or genuinely distinct content.
13. JavaScript rendering
If content or links load through JavaScript, Google must render the page to see them. Use URL Inspection to view the rendered HTML. If key text or links are missing there, search engines may miss them too. Server-side rendering or pre-rendering usually fixes this, and important links should be standard HTML links.
14. Site architecture
Important pages should be reachable within a few clicks of the homepage, URLs should be short and readable, and categories should group related pages logically. If you’re planning a redesign, our web design and development services build the structure around how customers search.
15. Hreflang (only if relevant)
Hreflang tells Google which language or regional version of a page to show. If your site serves only US customers in English, skip it. If you have other versions, make sure tags reference each other both ways and point to live, indexable URLs.
How to prioritize what you find
A technical SEO audit can surface dozens of issues. Work through them in this order:
- Fix anything blocking crawling or indexing of important pages.
- Repair broken redirects, internal 404s and HTTPS problems.
- Improve Core Web Vitals and mobile experience on high-value templates.
- Clean up duplicate content, internal linking and structured data.
- Re-crawl, request indexing for key pages and monitor Search Console.
Google needs time to recrawl and reprocess your pages, so measure progress over weeks and months, not days.
Frequently asked questions
How often should I run a technical SEO audit?
A full audit once or twice a year suits most business sites. Also run a quick check after any major change, such as a redesign, migration or new theme. Watch Search Console in between to catch new errors early.
Can I do a technical SEO audit myself?
You can cover the basics with Search Console, PageSpeed Insights and a crawling tool. The harder part is interpreting results and fixing your theme, server or code without breaking anything. Many businesses run the first pass and bring in a specialist for fixes.
How is a technical SEO audit different from a full SEO audit?
A technical audit covers how your site is built: crawling, indexing, speed and structure. A full audit adds keywords, content, backlinks and competitors. The technical side is usually the right place to start.
Will fixing technical issues guarantee better rankings?
No. Technical fixes remove obstacles, but rankings also depend on content, relevance, competition and links. A clean foundation gives your best pages a fair chance to compete.
Get a technical SEO audit for your website
Prefer to have experts run this checklist? Digital Solution Pros reviews your site’s crawling, indexing, speed and structure, explains findings in plain language and helps you fix what matters most.
Book a free consultation, learn more about our SEO services or browse more guides on our digital marketing blog.