What is technical SEO?

Technical SEO is the work that makes a site easy for search engines to crawl, render and understand: sitemaps, canonical URLs, fast pages, structured data and clean site structure.

Is Next.js good for SEO?

Yes. Server-rendered or statically generated pages give crawlers complete HTML, and Next.js makes metadata, sitemaps and structured data straightforward.

How often should I audit technical SEO?

Check Search Console weekly and run a full audit at least twice a year, plus before and after any redesign or migration.

Technical SEO checklist for 2026: what developers should get right

By GenRise Tech9 October 20263 min read

Great content cannot rank if search engines cannot crawl, render and understand it. Technical SEO is the foundation everything else rests on — and because it lives in the code, it is often the part marketers cannot fix on their own.

This checklist covers what we check on every website we build or audit.

Crawling and indexing

A robots.txt that allows important pages and points to your sitemap.
An XML sitemap listing every canonical URL, with accurate last-modified dates.
One canonical URL per page: consistent trailing slashes, HTTPS and www or non-www.
No important content hidden behind logins, infinite scroll or clicks that crawlers do not make.
Correct status codes: 200 for real pages, 301 for moved pages, 404 or 410 for removed ones.
Search Console and Bing Webmaster Tools verified, with the sitemap submitted to both.

Rendering

Google renders JavaScript, but not instantly, and many other crawlers — including some AI assistants — do not render it at all. Server-rendered or statically generated HTML that contains your main content is the safest choice.

Watch for content that only appears after an animation or interaction. Text that is present in the HTML but visually hidden until JavaScript runs is still risky for performance metrics and for crawlers that do not execute scripts.

Site structure and internal links

A clear hierarchy: home → hub pages (services, locations, blog) → detail pages.
Every page reachable within a few clicks from the homepage.
Descriptive anchor text — "SaaS development services", not "click here".
Breadcrumbs, both visible and in structured data.
No orphan pages that nothing links to.

On-page fundamentals

A unique, descriptive title tag of roughly 50–60 characters on every page.
A unique meta description that earns the click.
Exactly one h1 that matches the page's main topic, with logical h2/h3 structure below it.
Descriptive alt text on meaningful images.
Clean, readable URLs.

Core Web Vitals

Google's page-experience signals measure loading, interactivity and visual stability. The current thresholds for a good experience are:

Largest Contentful Paint (LCP) under 2.5 seconds.
Interaction to Next Paint (INP) under 200 milliseconds.
Cumulative Layout Shift (CLS) under 0.1.

The usual culprits are large unoptimised images, render-blocking scripts, heavy third-party tags, web fonts without proper loading strategies and intro animations that delay the main content.

Structured data

Schema.org markup in JSON-LD helps search engines understand who you are and what each page is about. Common types for service businesses are Organization, Service, BreadcrumbList, FAQPage, Article and LocalBusiness. Only mark up content that is visible on the page, and never add reviews or ratings that are not genuine — that can lead to manual penalties.

International SEO

If you target several countries or languages, use hreflang tags to tell search engines which version to show where, and create genuinely localised content — currency, spelling, regulations and examples — rather than copying pages with the country name swapped.

Visibility in AI search

AI assistants increasingly answer questions like "best software development company for startups". They rely on crawlable text, clear entity information and mentions across the web. Allow reputable AI crawlers in robots.txt if you want to be cited, keep factual information about your company consistent everywhere and consider an llms.txt file summarising what you do.

Monitor continuously

Technical SEO is not a one-off job. Review Search Console coverage and Core Web Vitals reports monthly, check for new crawl errors after every release and re-audit after redesigns or migrations.

Pages loading slowly? Read how to fix Core Web Vitals. Planning a rebuild? Use the website redesign SEO checklist, or see our digital marketing service.