How to Do a Technical SEO Audit in 2026

Most SEO advice focuses on content and keywords. But if your site has technical problems — slow pages, broken links, missing meta tags, crawl errors — none of that content work matters. A technical SEO audit finds these hidden issues so you can fix them before they tank your rankings.

What Is a Technical SEO Audit?

A technical SEO audit is a systematic review of your website's infrastructure to identify issues that prevent search engines from properly crawling, indexing, and ranking your pages. It covers everything from server response times to mobile usability to structured data.

Think of it like a building inspection. Your content is the interior design, but technical SEO is the foundation, plumbing, and electrical. If the foundation has cracks, a fresh coat of paint won't help.

Step 1: Check Crawlability

Search engines need to find and access your pages. Start by verifying the basics.

**Robots.txt** — Visit yoursite.com/robots.txt. Make sure you're not accidentally blocking important pages. A common mistake is leaving a "Disallow: /" rule from a staging environment that blocks everything.

**Sitemap.xml** — Check yoursite.com/sitemap.xml. Every important page should be listed. If you have hundreds of pages but your sitemap only shows 10, search engines are missing most of your content.

**Crawl errors** — Google Search Console's Coverage report shows which pages Google tried to crawl but couldn't. Look for 404 errors, server errors (5xx), and redirect loops. Fix these first — they're the most damaging.

Step 2: Evaluate Page Speed

Google has used page speed as a ranking factor since 2018, and Core Web Vitals became a signal in 2021. Slow sites rank lower and lose visitors.

**Largest Contentful Paint (LCP)** should be under 2.5 seconds. This measures how long it takes for the biggest visible element to load. Common culprits: unoptimized hero images, render-blocking JavaScript, slow server response.

**Cumulative Layout Shift (CLS)** should be under 0.1. This measures visual stability — do elements jump around as the page loads? Fix it by setting explicit dimensions on images and embeds.

**Interaction to Next Paint (INP)** should be under 200ms. This replaced First Input Delay in 2024 and measures overall responsiveness to user interactions.

Step 3: Audit On-Page Elements

Every page needs properly formatted on-page elements for search engines to understand what it's about.

**Title tags** — Each page should have a unique title under 60 characters that includes your target keyword. Duplicate or missing titles are one of the most common issues.

**Meta descriptions** — While not a direct ranking factor, they affect click-through rates from search results. Keep them under 160 characters and make them compelling.

**Heading structure** — Use a single H1 per page that describes the content. Use H2s and H3s to organize sections logically. Don't skip heading levels (going from H1 to H4).

**Image alt text** — Every image should have descriptive alt text. This helps with accessibility, image search rankings, and gives search engines context about visual content.

Step 4: Check Mobile Usability

Google uses mobile-first indexing, meaning it primarily uses the mobile version of your site for ranking. A site that works on desktop but breaks on mobile will rank poorly.

**Responsive design** — Every page should render correctly on screens from 320px to 1920px wide. Test on real devices, not just browser resize.

**Tap targets** — Buttons and links need to be large enough to tap on mobile. Google flags tap targets smaller than 48x48 pixels.

**No horizontal scroll** — Content shouldn't extend beyond the viewport on mobile. This usually means images or tables are too wide.

Step 5: Review Structured Data

Schema markup helps search engines understand your content and can earn rich results in search — star ratings, FAQs, product info, and more.

JSON-LD is preferred. Google recommends JSON-LD over microdata or RDFa. Add it in a script tag in your page head.

**Common schemas to add:** Organization (your brand), WebSite (sitelinks search), FAQ (for question pages), Product (for product pages), Article (for blog posts), and BreadcrumbList (for navigation).

Validate with Google's Rich Results Test. Paste any URL and it'll tell you which schemas are detected and whether they have errors.

Step 6: Assess AI Readiness

In 2026, technical SEO extends beyond Google. AI models like ChatGPT and Perplexity are driving real traffic through citations.

**Add an llms.txt file** to your domain root. This plain text file describes your site for AI crawlers — similar to robots.txt but for language models.

Structure content for extraction. AI models prefer content with clear headers, direct answers to questions, and well-organized sections. FAQ pages perform especially well.

Monitor AI citations. Track whether AI models mention or link to your site when answering questions in your niche.

Automate Your Audits

Running a manual technical audit takes hours and needs to be repeated regularly. RankWizrd automates the entire process — enter your URL, and get a full technical audit with scores across performance, optimization, content, authority, and AI readiness. Every issue comes with a fix recommendation and an impact estimate so you know what to prioritize.