Copied and never finished
v0 output is a starting point. Sites shipped straight from it often keep placeholder copy, "Your Company" links and buttons that go nowhere, which reads as unfinished to a visitor.
Was this site built with v0 by Vercel? How to tell
AI builder · default hosting v0-*.vercel.app
v0 turns a prompt into a Next.js project and deploys it to Vercel. Unlike most builders it is honest about it: the generated page carries <meta name="generator" content="v0.app">, which is the single clearest signal any AI builder leaves.
Older projects say v0.dev instead. Both are v0; the product was renamed.
The verdict and the evidence are free. The improvement report needs a free account.
How to check it yourself
No tools needed- Search the page source for
generator. If the content isv0.apporv0.dev, it is v0. - Look at the domain: default deployments are named
v0-<project>.vercel.app. - Check the response headers for
server: Vercel. On its own that only means Vercel hosting, not v0. - Look for
data-v0-t=attributes in the markup, left by some generated components.
What the scanner looks for
6 live rulesThese are the rules enabled in the database right now, with the weight each one carries. A single strong match is enough to name the builder; the weights decide how confident the verdict is.
| Rule | Where it looks | What it matches | Weight |
|---|---|---|---|
| v0 generator meta tag | the generator meta tag | v0(\.dev| by vercel) | 100 |
| v0 generator meta tag (v0.app) | the generator meta tag | v0\.app | 100 |
| v0 hosting domain | the site address | (^|\.)v0\.(build|dev)$ | 95 |
| v0 script host | the host a script is loaded from | (^|\.)v0\.dev$ | 90 |
| v0 default project domain | the site address | ^v0-[a-z0-9-]+\.vercel\.app$ | 88 |
| v0 source marker | the page source | v0\.dev/chat|data-v0-t=|built with v0 | 85 |
What v0 by Vercel sites usually get wrong
A page that weighs more than it needs to
Generated components pull in whole icon and UI libraries for a handful of elements. The result loads slowly on a phone, which affects both visitors and ranking.
Exported projects lose every marker
Once a v0 project is exported to GitHub and hosted elsewhere, nothing in the code says v0. Our scanner then reports "No AI builder detected", which is the honest answer rather than a guess.
Questions
Should I remove the v0 generator tag?
You can, and it takes one line in the layout. Removing it does not improve SEO; it only stops advertising how the page was made. Do it if you are delivering the site to a client.
Is a v0-*.vercel.app address bad for search?
It is not penalised, but every link you earn builds the reputation of that address, not yours. Move to your own domain before you promote the site.
