Guide
Is my v0 app secure?
A v0 app is secure on the frontend it generates, and exposed anywhere the backend it connects to was left open. The issues that matter are the database rules and the keys, not the interface, so the check is the same as any AI-built app: is the data readable, and did a secret key ship to the browser.
A great frontend is not the whole story
v0 is strong at producing clean, working interfaces. An interface does not store your data. The backend does, and the backend is where a stranger reads it if the rules are off. So a polished v0 app can still leak everything behind it.
A polished v0 app can still leak everything behind it.
Check the backend, not the buttons
- Is the database readable without a login? Turn on row-level security if you use Supabase, or set rules if you use Firebase.
- Did any secret key ship to the browser? Only publishable keys belong in client code.
- Are the response headers set? Frame protection and content-type protection are quick wins.
One scan covers it
Paste your v0 URL into Plaintext. It reads the public bundle and the endpoints and tells you whether the data behind your interface is actually protected.
Frequently asked
Does v0 handle security for me?
v0 handles the frontend it generates. It does not set the access rules on whatever database you connect, so the security of your data depends on those rules, which are yours to configure.
Can a v0 app leak data?
Yes, if the backend it connects to has no access rules or a secret key was exposed in the frontend. The interface being polished does not protect the data behind it.
Check your own app in about a minute. Paste your URL and Plaintext reads the shipped JavaScript, the public endpoints, and the database rules for the exact holes v0 and other AI builders leave open. The first scan is free.
Scan my app