What Is v0? Vercel's AI App Builder Explained
v0 is Vercel's AI app builder: describe a UI or an app and it generates a real Next.js project with React, Tailwind and shadcn/ui, with a live preview and one-click publishing to Vercel. What it's good at, how it differs from Lovable and Bolt, and what to know before shipping.
v0 is an AI app builder from Vercel, the company behind Next.js. You describe an interface or a whole app in a chat — "a pricing page with three tiers and a monthly/annual toggle" — and v0 writes the code and shows a live preview next to the conversation.
It started as a UI generator and has grown into a full app builder, with Git integration, a code editor and database connections. It lives at v0.app.
What v0 generates
v0 writes a standard, modern web stack:
- Next.js for the app framework.
- React and TypeScript.
- Tailwind CSS for styling.
- shadcn/ui for components.
That's a big advantage: the output is the same kind of code a professional team would write, so a developer can pick it up, and you're not locked into a proprietary format.
What it's good at
- Polished UI fast. v0's design output is consistently strong — dashboards, landing pages, forms.
- Turning a screenshot or mock-up into components.
- Next.js apps that will live on Vercel.
Publishing
There's a Publish button that deploys your app to Vercel and gives you a URL. You can connect a custom domain in the Vercel project afterwards. With Git sync, your code can live in GitHub, so you (or Claude Code, or a developer) can keep working on it outside v0. (How to Deploy a v0 App)
Pricing
v0 has a free tier with monthly credits and paid plans with more. Usage depends on how much generation you do. Check v0.app for current plans.
v0 vs Lovable vs Bolt
| v0 | Lovable | Bolt.new | |
|---|---|---|---|
| Made by | Vercel | Lovable | StackBlitz |
| Output | Next.js + shadcn/ui | React + Vite (and more) | Usually React + Vite |
| Strength | UI quality, Next.js | Full apps with built-in backend | Runs everything in the browser |
| Natural host | Vercel | Lovable Cloud | Bolt hosting / Netlify |
(Lovable vs Bolt vs v0 · What Is Bolt.new?)
Things to check before real users
- Secrets: API keys belong in Vercel environment variables, never in client code. (Hide API Keys in an AI-Built App)
- Data: if you connected a database, check its access rules and backups.
- Costs: serverless pricing scales with traffic; know what a spike would cost.
The summary
- v0 is Vercel's AI builder that writes real Next.js + Tailwind + shadcn/ui apps.
- It's excellent at UI and publishes to Vercel in one click.
- The code is standard, so you can take it anywhere later.
EasySpawn can host a v0-generated Next.js app on a persistent server with Postgres, HTTPS and backups, with Claude Code there to keep building it. See how it works for AI-built apps or join the waitlist.
Related: Self-Hosting Next.js Without Vercel · What Is Vercel? · Choose an AI App Builder · Figma to Code
Keep reading
How to Build a Landing Page That Gets Sign-Ups
A landing page has one job: get the visitor to take one action. The sections that work, how to write a headline that says what the product does, where to put the sign-up form, what to measure, and the technical basics that stop it looking broken when shared.
What Is Tailwind CSS? Why Every AI-Built App Seems to Use It
Tailwind CSS styles your app with small utility classes written straight in the HTML. What Tailwind is, how it differs from normal CSS and Bootstrap, why AI tools love it, what changed in Tailwind v4, and how to read those long class lists.