The first technical SEO audit we ever ran at Perform X Engine was for a client whose website looked perfectly fine on the surface. Nice design, decent content, reasonable traffic. But when we actually opened up the site and started digging, we found close to forty broken links, a robots.txt file quietly blocking half the blog, and a sitemap that had not been updated in over a year. None of this was visible just by looking at the site. You only find it when you actually go looking.
That is the whole point of a technical seo audit. It is not about how your website looks. It is about what is happening underneath, the part search engines see but most visitors never notice. In this guide, we are going to walk you through our full process, step by step, based on real audits we have personally run for real client websites. By the end, you will know exactly how to do a technical seo audit yourself, or at the very least, know exactly what to expect if you hire someone to do it for you.
What Is a Technical SEO Audit?
A technical seo audit is a complete check of your website’s backend health, covering things like crawlability, indexing, page speed, mobile experience, site structure, and security. Instead of looking at your content or keywords, a technical site audit focuses entirely on whether search engines can properly access, read, and understand your website in the first place.
Think of it like a car inspection. The car might look shiny and drive fine on a short trip, but an inspection checks the engine, brakes, and electrical system, the things that actually determine whether it will keep running smoothly over time. A technical seo website audit does the same thing for your site.
Why Perform Technical SEO Audit in the First Place?
We get asked this a lot, especially from business owners who feel like their website is already “working fine.” Here is why we always insist on running a full audit before touching anything else in an SEO strategy.
It uncovers hidden problems you cannot see just by browsing your own site. Things like blocked pages, broken redirects, or duplicate content often go unnoticed for months, or even years, quietly limiting your visibility the entire time.
It protects your investment in content and marketing. There is no point spending money creating great content if search engines cannot even crawl and index the pages properly.
It improves real user experience. Many of the same issues that hurt SEO, like slow loading pages and broken links, also frustrate actual visitors and hurt conversions.
It gives you a clear, prioritized action plan. Instead of guessing what to fix next, a proper audit tells you exactly where the biggest opportunities are hiding.
This is exactly why we treat a technical seo audit as the very first step with every new client, before we even talk about content or link building.
How to Conduct a Technical SEO Site Audit: Our Full Process
Now let’s get into the actual process. This is the same step by step approach we personally use when running a technical seo audit guide for our own clients, simplified so anyone can follow along.
Step 1: Confirm Indexing Status
Before anything else, check how many of your pages are actually indexed by Google. You can do this quickly by searching “site:yourwebsite.com” directly in Google, or by checking the coverage report inside Google Search Console.
Compare this number to how many pages your website actually has. If there is a big gap, something is likely blocking pages from being indexed, and that becomes your first priority to investigate.
Step 2: Check Crawlability and Robots.txt
Open your robots.txt file, usually found at yourwebsite.com/robots.txt, and check carefully for any lines accidentally blocking important sections of your site. We have personally found this mistake more times than we can count, and it is one of the fastest wins once you catch it.
Also review your overall site structure. Every important page should be reachable within just a few clicks from your homepage. Pages buried too deep, or with no internal links pointing to them at all, are much harder for search engines to discover.
Step 3: Audit Your XML Sitemap
Your sitemap tells search engines exactly which pages you consider important. During this part of a technical seo audit, check that your sitemap is up to date, contains only real, working pages, and has been properly submitted through Google Search Console.
An outdated sitemap listing old, deleted, or broken pages can waste crawl budget and confuse search engines about what your site actually looks like today.
Step 4: Find and Fix Crawl Errors
Inside Google Search Console, check the “Pages” and “Coverage” reports for crawl errors, including server errors, broken pages, and soft 404s. Each of these represents a page search engines tried to access but could not properly load or understand.
Fixing these errors usually involves either restoring the missing page, setting up a proper redirect, or removing outdated internal links that still point to it.
Step 5: Check Page Speed and Core Web Vitals
Page speed plays a major role in both rankings and user experience. Use a tool like Google PageSpeed Insights to check your site’s performance score, along with the specific Core Web Vitals metrics, which measure loading speed, responsiveness, and visual stability.
If your scores are low, common fixes include compressing images, minimizing unnecessary code, and using a content delivery network to speed up loading across different locations.
Step 6: Test Mobile Friendliness
Since Google primarily evaluates the mobile version of your website, test your site directly on a real mobile device, not just a browser preview. Check for readable text sizes, properly spaced buttons, and content that matches your desktop version completely. Missing content on mobile is treated as missing content altogether by Google.
Step 7: Review HTTPS and Security
Confirm your website loads securely with HTTPS, shown by a lock icon in the browser address bar. If your site still shows a “not secure” warning, this needs to be fixed immediately, both for rankings and for basic visitor trust.
Step 8: Check for Duplicate Content and Canonical Issues
Duplicate or very similar content across multiple URLs can confuse search engines about which version to rank. During a proper technical seo audit, check for duplicate pages, and make sure canonical tags are correctly implemented to point search engines toward the preferred version of each page.
Step 9: Review Structured Data
Check whether your important pages, like products, articles, or reviews, have proper structured data markup implemented. This helps search engines understand your content more accurately and can help your listings stand out with extra details in search results.
Step 10: Analyze JavaScript Rendering
If your website relies heavily on JavaScript, confirm that important content and internal links are visible in the initial page load, not just after user interaction. Many crawlers, especially those used by newer AI search tools, do not fully process JavaScript the same way Google does, so this step matters more today than it ever has before.
Step 11: Compile Findings Into a Prioritized Report
Once every section has been reviewed, the final step of any solid technical seo audit is organizing everything into a clear, prioritized list. We always separate our findings into three simple categories: critical issues that need immediate attention, medium priority issues to fix soon, and smaller optimizations that can be handled over time.
Technical SEO Audit Checklist Table
| Audit Area | What to Check | Common Fix |
| Indexing | Compare indexed pages vs total pages | Fix blocking tags or settings |
| Crawlability | Robots.txt and internal linking | Update robots.txt, add internal links |
| Sitemap | Accuracy and submission status | Update and resubmit sitemap |
| Crawl Errors | Broken pages, server errors | Fix, redirect, or remove old links |
| Page Speed | Core Web Vitals scores | Compress images, reduce code |
| Mobile Friendliness | Layout, text size, content parity | Test on real devices, fix layout issues |
| HTTPS | Secure connection | Install SSL certificate |
| Duplicate Content | Similar pages competing for rankings | Add canonical tags |
| Structured Data | Schema markup accuracy | Implement or correct schema |
| JavaScript | Content visibility on initial load | Ensure key content loads in HTML |
Common Mistakes People Make While Auditing
Based on the audits we have personally run over the years, here are mistakes we see again and again, even from experienced marketers:
- Only checking the homepage instead of reviewing different page types across the site
- Ignoring mobile testing and assuming the desktop experience is enough
- Fixing issues randomly instead of prioritizing based on actual impact
- Forgetting to re-audit after a website redesign or platform migration
- Treating an audit as a one time task instead of an ongoing habit
How Often Should You Perform a Technical SEO Audit?
This is one of the most common questions we get from clients, and our honest answer is always the same. A full technical seo audit should be run at least once every few months, and immediately after any major website change, like a redesign, platform migration, or large content update.
Smaller websites with few changes can sometimes stretch this to twice a year, but larger, frequently updated sites benefit from more regular checks, since new issues tend to appear quietly as a site grows.
Technical SEO Audits and AI Search (AEO, GEO, AIO)
Search behavior is shifting fast, and a technical seo audit today needs to think beyond just traditional Google rankings. AI tools like ChatGPT, Gemini, and Google’s AI Overviews rely on being able to properly access and understand your website before they can reference or cite it in an AI generated answer.
Here is what we personally add to every audit now, specifically for AI search visibility:
- Confirm important content and internal links appear directly in the initial HTML, since many AI crawlers do not process JavaScript the way Google does
- Check that your robots.txt file allows relevant AI crawlers, if AI visibility is part of your goal
- Keep headings, titles, and structured data consistent with each other, since mismatched information makes it harder for AI systems to understand your content clearly
- Make sure your site loads quickly and cleanly, since both traditional search engines and AI systems favor content that is easy to process efficiently
Including these checks in your audit process helps future proof your visibility across traditional search results, AI Overviews, and the growing number of AI powered answer engines.
Final Thoughts From Our Team
If there is one lesson we keep learning with every audit we run, it is this: the issues that hurt a website’s rankings the most are usually invisible until someone actually goes looking for them. A proper technical seo audit is exactly that, a deliberate, structured way of finding the hidden problems before they quietly cost you traffic for months or even years.
Start with the basics. Check your indexing, fix your crawl errors, and test your page speed and mobile experience. These simple steps alone will uncover the majority of issues holding most websites back.
If you would rather have an experienced team handle this for you, the team at Perform X Engine runs full technical seo audits for businesses every day, and we would be glad to show you exactly what might be holding your website back.
Frequently Asked Questions About Technical SEO Audits
What is included in a technical seo audit?
A technical seo audit typically includes checking indexing status, crawlability, sitemap accuracy, page speed, mobile friendliness, HTTPS, duplicate content, structured data, and JavaScript rendering.
How to do technical seo audit without expensive tools?
Many basic checks can be done using free tools like Google Search Console and Google PageSpeed Insights, though larger websites often benefit from more advanced crawling tools for a deeper technical site audit.
How to conduct a technical seo site audit for a small website?
For smaller websites, focus first on indexing status, crawl errors, page speed, and mobile friendliness, since these usually have the biggest impact relative to the effort required.
Why perform technical seo audit regularly instead of just once?
Websites change constantly through content updates, redesigns, and plugin changes, so new technical issues can appear at any time, making regular audits necessary to maintain strong visibility.
How long does a full technical seo website audit take?
Depending on the size of the website, a thorough audit can take anywhere from a few hours for a small site to several days for a large, complex website with thousands of pages.