Web Developer SEO Checklist: What to Audit Before Every Launch

A site can look finished and still launch broken for search. The design is approved, the CMS is clean, the animations work, and the client is happy. Then Google hits blocked pages, duplicate titles, slow templates, missing canonicals, and no sitemap.

This checklist is for web developers. It focuses on the SEO work you can control before launch and the handoff checks that prevent painful follow-up later.

1. Crawlability

Search engines need to reach the pages that matter.

• Check robots.txt for staging rules that accidentally made it to production.
• Confirm important pages are linked from navigation, footer, hubs, or contextual links.
• Generate and review the XML sitemap.
• Remove orphan pages from the launch plan or link them properly.
• Make sure internal links use crawlable <a href> elements.

2. Indexability

A crawlable page still needs to be indexable.

• Remove accidental noindex tags from important pages.
• Add self-referencing canonical tags on canonical pages.
• Resolve duplicate URL patterns: HTTP, HTTPS, www, non-www, trailing slash, and parameters.
• Check that redirects resolve in one hop where possible.
• Confirm important pages return successful status codes.

3. Metadata

Metadata is not a final copywriting pass. It should be part of the template and CMS design.

• Every important page has a unique, descriptive title.
• Every important page has a useful meta description.
• CMS collections expose title and description fields.
• Fallback templates do not create duplicate titles across dozens of pages.
• Open Graph and Twitter tags use the same intentional page data.

4. Headings and page structure

Good headings help users, clients, editors, and crawlers understand the page.

• Use one clear H1 per page.
• Use H2s for major sections and H3s only when they support the structure.
• Do not use heading tags only for visual styling.
• Make service, product, location, and comparison pages easy to scan.

5. Structured data

Add schema when it matches visible content. Do not invent facts just to fill a schema type.

• Organization schema on the site.
• Breadcrumb schema on pages with clear hierarchy.
• Article schema on guides and blog posts.
• FAQ schema only when the page contains visible FAQ content.
• Product, SoftwareApplication, LocalBusiness, or Service schema only when it fits the actual page.

6. Core Web Vitals and performance

Developers own the performance budget. Treat SEO and UX as the same launch concern.

• Optimize the LCP element, usually the hero image or main heading area.
• Reserve dimensions for images, embeds, and banners to prevent layout shift.
• Trim unnecessary JavaScript and third-party scripts.
• Use font loading intentionally.
• Test mobile separately from desktop.

7. Analytics and search setup

A launch without measurement creates arguments later.

• Install GA4 or the client's analytics stack.
• Configure key conversion events.
• Verify Google Search Console access.
• Submit the XML sitemap after launch.
• Annotate the launch date in reporting notes.

8. Post-launch review

Do not disappear after go-live. Schedule the follow-up while the project is still active.

1. Check crawl and indexation after a few days.
2. Review Search Console coverage and performance after data appears.
3. Run another audit after redirects, CMS edits, and scripts have settled.
4. Fix regressions before they become client complaints.
5. Turn remaining recommendations into a monthly SEO maintenance plan.

If you want the checklist converted into a client deliverable, run a free SEO audit and pair the output with the SEO for web developers guide.