Canonical confusion
If the production page says another host is canonical, Google may ignore the URL you submitted. This often happens when metadata still points to a temporary Vercel domain or an old domain.
Vercel SEO Preflight
Test redirects, canonical URLs, robots.txt, sitemap.xml, noindex tags, and basic metadata before submitting a new Next.js site to Search Console.
What this catches
Launch preflight
A new Next.js site can load perfectly in the browser and still fail Google indexing. The usual cause is not one dramatic SEO problem. It is a small technical signal that tells crawlers the page is not the preferred page, not ready to index, or not discoverable enough.
If the production page says another host is canonical, Google may ignore the URL you submitted. This often happens when metadata still points to a temporary Vercel domain or an old domain.
A restrictive robots.txt file, a noindex meta tag, or an X-Robots-Tag header can make a page available to users but unavailable for search indexing.
Google can find pages faster when sitemap.xml is readable, robots.txt references the sitemap, and all sitemap URLs use the final production domain.
A homepage with only a form, placeholder text, or very little visible context can be treated as low-value or soft-404-like even when it returns HTTP 200.
Fix faster
The report is designed for people who build with Codex, Claude, Gemini, Cursor, or similar AI coding tools. Each issue includes a plain-English explanation and a copyable fix prompt, so the result can become a concrete engineering task instead of a vague SEO note.
FAQ
No. It cannot force indexing or guarantee rankings. It checks whether obvious technical blockers are present before you submit a URL or sitemap in Google Search Console.
Preview URLs and temporary Vercel domains can have different redirects, canonical URLs, robots.txt files, or sitemap URLs. The production domain is the URL Google will judge.
Fix Critical issues first, especially noindex directives, blocked robots.txt rules, non-200 responses, and canonical URLs pointing to another host. Then review warnings.
Many builders use Codex, Claude, Gemini, or Cursor to ship small sites. Copyable prompts turn SEO findings into concrete code tasks that an AI coding assistant can act on.