The Technical SEO Checklist Every Website Needs in 2026

You can write the best content in your industry and still be invisible on Google if the technical foundations are broken. Here's the checklist I run on every site I audit — work through it and you'll be ahead of most of your competitors.

Crawlability & indexing

• robots.txt isn't accidentally blocking important pages.
• An XML sitemap exists, is current, and is submitted to Search Console.
• Important pages return 200, redirects are 301 (not 302), and there are no redirect chains.
• Canonical tags point to the correct, single version of each page.

On-page fundamentals

• Every page has a unique, descriptive title and meta description.
• A single, clear <h1> per page with a logical heading hierarchy.
• Descriptive, keyword-aware URLs (no ?id=8842).
• Alt text on meaningful images.

Structured data

Structured data (schema.org) helps search engines understand your content and can earn you rich results:

• Organization / LocalBusiness for your brand.
• BreadcrumbList for navigation.
• Article / BlogPosting for content.
• Product and FAQPage where relevant.

Performance & mobile

• Passing Core Web Vitals on mobile (see my performance post).
• Genuinely responsive, not just "shrunk down".
• HTTPS everywhere, with HSTS.

The honest truth

Technical SEO isn't a one-off. Sites drift — pages get added, plugins break things, redirects pile up. The businesses that win treat SEO as ongoing maintenance, not a single project. That's exactly what a website audit is designed to catch.