How to connect a domain to v0

How connecting a domain to v0 works

Every v0 project maps to a Vercel project, and pressing Deploy creates a Vercel deployment. Custom-domain handling is therefore identical to Vercel's: apex via an A record to 76.76.21.21, www and subdomains via a CNAME to your project's unique Vercel target, or nameserver delegation for wildcards.

HTTPS is automatic for both the .vercel.app URL and your custom domain. v0's own docs defer to Vercel for the exact DNS values, so if a detail isn't visible in v0, use 'Inspect on Vercel' and manage the domain from the Vercel dashboard.

DNS records to set at your registrar

Values verified from v0's official docs, as of June 2026. Providers can change these — confirm against v0's current dashboard.

Step by step

1. Have or buy a domain (search and register on JustDomain.ai).
2. In v0, deploy your project so a Vercel deployment exists.
3. Open domain settings: Publish → Customize Domain, or Project Menu → Domains (or click Inspect on Vercel).
4. Add your custom domain (e.g. example.com) and accept the prompt to add www.
5. At your registrar, add the A record (@ → 76.76.21.21) and the CNAME (www → the exact Vercel target shown).
6. Save and wait for propagation (minutes up to 24–48 hours).
7. Vercel verifies DNS and auto-provisions SSL; the domain attaches to your latest production deployment.
8. Open https://example.com to confirm it's live — redeploy in v0 to update the live site.

Common gotchas

• It's Vercel underneath — if v0's UI doesn't show a detail, use 'Inspect on Vercel'.
• Apex = A record, www = CNAME; don't try to CNAME the apex.
• No AAAA/IPv6 — the same Vercel limitation applies.
• The domain points at your latest production deployment, so redeploy in v0 to publish changes.