How to Run a Technical SEO Audit Without a Huge Toolset

Great content on a site that search engines can’t properly crawl or index is invisible, no matter how well it’s written. Technical SEO audits exist to catch the plumbing problems — the issues that have nothing to do with the quality of your writing but everything to do with whether search engines can find, understand, and trust your pages. Here’s the sequence we work through.

Start with crawlability

Before anything else, we check whether search engine crawlers can actually access the site. That means reviewing the robots.txt file for accidental blocks, checking that important pages aren’t set to “noindex” by mistake, and confirming there isn’t a leftover staging-site directive blocking the whole domain — a surprisingly common issue after a site migration. We also check server response codes across key pages, looking for unexpected redirects, soft 404s, or server errors that quietly choke off crawler access.

Confirm what’s actually indexed

Being crawlable doesn’t guarantee a page is indexed. We compare the list of pages a business wants indexed against what search engines have actually indexed, looking for gaps — pages that should be findable but aren’t — as well as the opposite problem, where low-value pages like internal search results or filtered category pages have been indexed and are diluting the site’s overall quality signal.

Site speed and Core Web Vitals

Page speed affects both user experience and rankings. We check load times on both mobile and desktop, identify what’s actually slowing pages down — often unoptimized images, unnecessary third-party scripts, or render-blocking code — and prioritize fixes by impact. Core Web Vitals specifically measure loading performance, interactivity, and visual stability; poor scores here can suppress rankings even when content quality is strong.

XML sitemaps and internal structure

A clean, accurate XML sitemap helps search engines discover new and updated content efficiently. We check that the sitemap only includes canonical, indexable URLs, that it’s actually submitted to search engines, and that it’s kept current as pages are added or removed. We pair this with a review of the site’s internal linking depth — ideally, no important page should be more than three or four clicks from the homepage.

Structured data

Schema markup helps search engines understand exactly what a page represents — a service, an article, a review, a local business — and can unlock enhanced search result features. We check that structured data is implemented correctly, matches the visible page content (mismatched schema can trigger manual penalties), and covers the page types most likely to benefit, such as service pages, articles, and FAQs.

Mobile usability

With most search traffic now happening on mobile devices, we test every template on an actual phone-sized viewport, not just a resized browser window. We look for tap targets that are too small or too close together, text that requires zooming to read, and layout shifts that happen as a page loads — all of which hurt both usability and search performance.

Duplicate content and canonicalization

Finally, we check for duplicate or near-duplicate content, whether caused by URL parameters, printer-friendly page versions, or content syndicated elsewhere. Canonical tags should point clearly to the preferred version of any page that exists in more than one form, so search engines consolidate ranking signals rather than splitting them across near-identical URLs.

A technical audit isn’t a one-off task before a site launch — search engines change their crawling and rendering behavior over time, and sites accumulate technical debt as pages get added, redesigned, or removed. We recommend revisiting the core technical health of a site at least twice a year.