Deckproof
DE
00 / Free check for sites made with Lovable

Your Lovable app is live. Is it safe, legal, and solid?

Lovable ships fast. It does not ship secure by default. Paste the address and in 30 seconds you get a grade, what is wrong in plain words, and the exact text to paste back into Lovable to fix it.

PASTE YOUR SITE'S ADDRESS
https://
No signupWe only look, we change nothingYour pages are not stored
01 / What usually goes wrong on Lovable

The defaults that bite.

These are the mistakes we see most on sites built with Lovable. Not your fault: they are what the builder does unless you tell it otherwise.

01The Supabase anon key is in the bundle and Row-Level Security is often off or set to a permissive policy, so the database is readable by anyone.
02You cannot set HTTP security headers on the lovable.app domain, so CSP, HSTS and clickjacking protection are usually missing.
03Lovable's built-in scanner only checks that RLS exists, not that the policies actually restrict access.

The fix, in short

Enable RLS with real per-user policies on every table, and add security headers via a Cloudflare-proxied custom domain or by moving hosting to Vercel.

02 / What the scan covers

The same 112 checks, whatever built your site.

A sample from each area. See every check.

SECURITY
A-01
Anyone can read your database
Your Supabase table answers to anyone who asks, no login needed. That is your users' data, readable by strangers. We ask once for a count only, never for a row, and report what came back.
CRITICAL
A-04
Your Firebase database is open
Your Firebase data can be read without logging in.
CRITICAL
S-01
Your master key is inside the page
The Supabase service key sits in your site's code. Whoever reads it owns your whole database, every lock ignored.
CRITICAL
EU LEGAL INFORMATION
DE-IMP-01
No Impressum found
German law expects a provider page on commercial sites (§5 DDG). We say what we found and link the rule. General information, not legal advice.
HIGH
DE-PRIV-01
No privacy notice found
EU law expects one (Art. 13 GDPR). We look for a linked page under the usual names. General information, not legal advice.
HIGH
DE-IMP-04
Impressum is empty until JavaScript runs
The Impressum page exists, but the server sends it almost empty and the details only appear once JavaScript has run. With JavaScript off, in an archive, or to an automated check the page reads as blank. General information, not legal advice.
MEDIUM
QUALITY
Q-16
A file could not be checked
Our own request for robots.txt, sitemap.xml or the favicon got no answer, so we say that instead of claiming the file is missing. Costs no points.
LOW
Q-01
Search engines are told to stay away
A noindex tag or header, or a robots.txt that blocks everything, is still on. Preview builds ship with it; a launched site with it is invisible.
HIGH
Q-05c
Title is still the template default
The tab reads "Vite + React" or "Lovable App". That is the headline of your search result.
MEDIUM