You can post great content for months and still watch your rankings stay flat. Most of the time, the problem isn’t your writing. It’s something happening behind the scenes on your site.
Technical SEO issues are quiet traffic killers. You won’t see an error message. You’ll just notice pages that never rank, search engines skipping parts of your site, and visitors leaving because a page loads too slowly.
This guide shows you how to find technical SEO issues on your website, step by step, using simple SEO tools and plain language.
How Do You Find Technical SEO Issues? (Quick Answer)
To find technical SEO issues, run a technical SEO audit using tools such as Google Search Console, Screaming Frog, and PageSpeed Insights. Check if search engines can crawl your site, if your pages are indexed, how fast your site loads, and how it looks on mobile. Fix the biggest problems first: broken pages, blocked crawlers, and slow load times.
What Are Technical SEO Issues?
A technical SEO issue is any problem that stops search engines from crawling, reading, or properly understanding your website. It’s different from a content problem or a backlink problem; it’s about the site’s foundation.
Common types include:
- Search engines can’t crawl or index certain pages
- Slow site speed and weak Core Web Vitals scores
- Pages that don’t work well on phones
- Broken links and long redirect chains
- Duplicate pages competing with each other
- Missing or broken schema markup (structured data)
- HTTPS or security setup problems
Key takeaway: If search engines can’t easily read your site, even great content won’t rank well.
How to Run a Technical SEO Audit: Step-by-Step
Step 1: Check If Search Engines Can Crawl and Index Your Site
Start with Google Search Console. Open the Page Indexing report. It shows which pages Google has indexed and which pages are excluded, along with the reason.
Look for:
- Pages marked “Crawled – currently not indexed”
- Pages blocked by robots.txt
- Server errors stopping Google from loading a page
- Pages that accidentally have a noindex tag
Step 2: Check Your Site Speed
Use PageSpeed Insights to check your Core Web Vitals scores:
- How fast the main content loads (LCP)
- How fast the page responds when someone clicks or taps (INP)
- Whether the page jumps around while loading (CLS)
A common mistake: only checking the homepage. Test your key pages too; speed often varies page to page.
Step 3: Crawl Your Whole Site
Use a crawling tool like Screaming Frog or Sitebulb. It works like a search engine, moving through every page on your site, and flags:
- Broken links (404 errors)
- Long redirect chains
- Duplicate page titles and descriptions
- Images missing alt text
- Pages with no internal links pointing to them
Step 4: Check How Your Site Works on Mobile
Google uses the mobile version of a site’s content, crawled with the smartphone agent, for mobile-first indexing, so your mobile experience should contain the same important content and structured data as the desktop version.
Use Google’s Search Console and browser/device testing to check your mobile experience. Look for:
- Text that’s too small to read.
- Buttons or links placed too close together.
- Content that doesn’t fit the screen without scrolling sideways.
Step 5: Check Your Schema Markup
Schema markup is extra code that helps search engines understand what a page is about. Use Google’s Rich Results Test to check if your schema is set up correctly for products, FAQs, articles, or reviews.
Step 6: Check for Duplicate Pages
Duplicate content confuses search engines about which page to rank. Check that:
- Canonical tags point to the right page
- URL parameters aren’t creating extra copies of the same page
- Both the HTTP and HTTPS versions of your site aren’t indexed at once
Step 7: Check Redirects and HTTPS
Check that HTTP URLs redirect to their HTTPS versions and that important redirects lead directly to the correct destination. Look for redirect chains, redirect loops, broken redirects, and internal links pointing to old URLs.
Also make sure your preferred domain version is consistent across internal links, canonical tags, and your sitemap.
Technical SEO Checklist: What Should You Check?
Use this technical SEO audit checklist to review the core areas that can affect crawling, indexing, performance, and search visibility.
| Category | What to Check | Tools |
| Crawling | Robots.txt, sitemap, crawl errors | Google Search Console |
| Indexing | Which pages are indexed or excluded | Search Console Page Indexing |
| Speed | Core Web Vitals, load time | PageSpeed Insights |
| Mobile | Mobile layout, content, usability, and performance | Search Console + PageSpeed Insights |
| Links | Broken links, redirect chains | Screaming Frog |
| Schema | Whether structured data is valid | Rich Results Test |
| Security | HTTPS setup, mixed content | Search Console Security Report |
Common Technical SEO Mistakes to Avoid
- Ignoring crawl efficiency on large sites with thousands or millions of pages, where unnecessary crawling can become a bigger technical concern.
- Fixing the symptom, not the cause by redirecting a broken page instead of finding out why it broke.
- Skipping mobile checks because the desktop site looks fine.
- Forgetting to update the sitemap after a redesign.
- Treating an audit as a one-time job instead of ongoing upkeep.
Common misconception: People think technical SEO is a one-time task. In reality, you need to check again after any redesign, migration, or big content update.
What Has Changed in Technical SEO in 2026?
Technical SEO isn’t what it was a couple of years ago. AI-powered search has raised the bar.
What’s different now:
- AI crawlers matter too: If you want your content to be accessible to AI systems, review your robots.txt rules and make sure you’re not unintentionally blocking relevant crawlers.
- Structured data matters more: Clear, relevant structured data can help search engines better understand content, making it easier to organize information that AI search engines are more likely to quote, although it doesn’t guarantee AI citations.
- Performance still matters: Monitor Core Web Vitals and real-world page performance, especially on important landing pages and mobile devices.
- Clear structure helps machines understand content: Descriptive headings, logical internal links, and clearly organized content make important information easier for search engines and other retrieval systems to interpret.
Key takeaway: A 2026 technical SEO audit should also check AI crawler access and structured data, not just the classic basics.
The Bottom Line
Finding technical SEO issues doesn’t require checking hundreds of metrics at once.
Start with crawling and indexing. Then review your sitemap, robots.txt, redirects, canonicals, internal links, performance, mobile experience, and HTTPS. Use SEO tools to discover problems, but use SEO judgment to determine which ones actually matter.
This is something we see regularly at Crawl Vision during website audits. A good technical SEO audit isn’t about creating the longest list of errors. It’s about finding the problems that matter most and prioritizing the fixes that can make a real difference.
Ultimately, the goal is simple: make sure your most important pages can be discovered, understood, indexed, and accessed by both search engines and users.
