Guide
Is my Lovable app secure?
A Lovable app is only as secure as the database rules and keys behind it, and by default those are the two things most likely to be wrong. The most common problems are a Supabase database that anyone can read without logging in and secret keys shipped to the browser, both of which are checkable from your public URL in about a minute.
Why AI-built apps ship with holes
Lovable writes your frontend and wires it to a backend like Supabase. It is good at making things work. It is not built to lock them down, so the safe-by-default settings are often left off because leaving them on would have made the app harder to build.
If your Supabase tables have row-level security off, anyone can read every row from the browser.
The result is that a working Lovable app and a secure Lovable app are two different things, and the gap is invisible from the outside until someone goes looking.
The three things to check first
- Database access. If your Supabase tables have row-level security off, anyone can read every row from the browser. This is the single most common and most damaging issue.
- Exposed keys. The publishable key belongs in the browser. The service-role key does not. If it shipped in your JavaScript, someone can bypass all your database rules.
- Security headers. Missing headers let your app be framed, sniffed, or called by any other site. Lower severity, still worth fixing.
How to check without being technical
You do not need to read your own code. Everything above is visible in what the browser already downloads: the JavaScript bundle, the network requests, and the response headers. A scanner reads those the same way an attacker would and tells you in plain language what is open.
Paste your live URL into Plaintext and it reports the issues worst first, with the exact fix for each.
Frequently asked
Does Lovable make secure apps?
Lovable can make secure apps, but security is not automatic. The framework leaves database rules and key handling up to how the app was built, so a working app often still has its database readable or its keys exposed until someone checks and fixes it.
Can someone steal data from my Lovable app?
Yes, if your Supabase row-level security is off or your service-role key shipped to the browser. Both let a stranger read or change your data directly. Both are checkable from your public URL, and both are fixable in the Supabase dashboard once you know.
How do I know if my Lovable app is safe?
Scan your live URL with a passive scanner like Plaintext. It reads the shipped JavaScript, the public endpoints, and the database rules and reports what is exposed. A clean scan means nothing was found in what was tested.
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 Lovable and other AI builders leave open. The first scan is free.
Scan my app