v0 generates beautiful React components fast. Scan the deployed site to catch what generated UI leaves behind — semantics, contrast, and pages that were never wired up.
Next.js, usually server-rendered — the best starting point here. v0 emits Next.js App Router components, so unlike most AI builders your content generally does reach crawlers as real HTML. That removes the biggest SEO failure mode up front, which is why the v0 scan spends its effort on accessibility, semantics and the pages you never finished instead.
v0 is a component generator that people use as a site builder, and the distinction shows up in the results. What it produces is typically well-structured, Tailwind-styled, and built on Radix primitives that come with real accessibility behaviour already attached.
The failures are therefore not the usual AI-builder failures. Your HTML is fine. What we find instead is the seam between generated components and the human edits made afterwards — a Radix Dialog replaced with a plain div, a contrast ratio broken by a brand colour swap, an aria-label left describing the component it was copied from.
The other recurring one is structural: v0 makes it very easy to generate a nav linking to five pages and then build only two of them.
These are the launch-blockers we actually find on v0 builds, roughly in order of how often they come back positive — each with the specific change that clears it.
Radix primitives ship with focus traps, roles and keyboard handling built in. Swapping one for a styled div — which is a natural thing to do when tweaking a design — silently removes all of it, and nothing visibly changes.
The fix: We run a full axe-core audit against the live page and report each violation with the element that caused it, so you can see exactly which component lost its semantics.
Generated palettes are accessible by default. Replacing them with your own brand colours is the single most common way a v0 site drops below WCAG AA — most often on muted body text and on white text over a mid-tone brand button.
The fix: We report every text/background pair below 4.5:1 (3:1 for large text) with the measured ratio, so you know which shade to darken.
v0 generates a complete-looking navigation from the first prompt. The routes behind it are your job, and the ones you skipped 404 — which wastes crawl budget and reads as an abandoned site to a visitor.
The fix: We crawl every internal link on your site and list the ones that return 404, with the page each broken link is on.
Generated markup frequently uses a plain <img> with a full-resolution source. On Next.js that skips the whole optimisation pipeline — no resizing, no modern formats, no lazy loading — and it is usually your Largest Contentful Paint.
The fix: Swap to next/image with explicit width and height. We report which image is your LCP element and what it weighs.
Because v0 starts from a component rather than a site, the App Router metadata export is often still the Next.js default or absent entirely — so your search snippet is either "Create Next App" or whatever Google scrapes from the body.
The fix: Export a metadata object per route with a real title and description, and confirm it in View Source on the deployed URL.
Paste your v0 link and get a free Launch Score with your top problems.
Unlock the report for $12 (₹299 in India) — we scan every page and write the fixes for v0.
Paste the fixes into v0, say "repair it", and re-scan to confirm. Done.
The short version, if you would rather do it by hand. Everything here is something you can verify yourself in a few minutes.
Better than most AI builders, yes — v0 emits Next.js, so your content usually reaches crawlers as real server-rendered HTML. What it does not do for you is per-route titles and descriptions, a sitemap, or internal links to the pages you never built.
Radix is accessible until you replace it. The usual sequence is a Dialog or DropdownMenu swapped for a styled div during a design tweak, which removes the roles, focus trap and keyboard handling at once while looking identical. Our axe-core audit names the element.
Your deployed site. A v0 preview is not what Google crawls or what your visitors load, and the differences — environment variables, image optimisation, real network latency — are exactly where the problems are.
Yes. We run real Google Lighthouse and report your Largest Contentful Paint element specifically, with its file size, so you know which single image to fix first rather than optimising all of them.
The free Launch Score covers your home page with no signup. The full accessibility audit across every page, the broken-link crawl and the v0-specific fixes are in the paid report, from $12 (₹299 in India).