Free Tool

Security Headers Checker

Is your Lovable app secure? Scan for missing CSP, HSTS, X-Frame-Options, Permissions-Policy, and 6 more security headers. Get an A-F grade and a prompt to fix every issue.

Lovable Guide

How to Add Security Headers to Your Lovable App

Most Lovable apps launch without any security headers configured. This means your app may be vulnerable to clickjacking, XSS attacks, and data leaks. The good news: adding security headers is a one-time fix you can apply with a single prompt.

Scan your app

Enter your Lovable app URL above and check which security headers are missing. Focus on any headers graded D or F.

Copy the fix prompt

Click 'Copy Fix Prompt' to get a Lovable-ready prompt that adds all missing headers at once.

Paste into Lovable

Paste the prompt into Lovable. It will configure your server or hosting platform to send the correct headers.

Re-scan to verify

After deploying, scan again. Aim for an overall grade of A — your users and their data will be safer.

Example prompt to paste into Lovable:

Add the following security headers to my Lovable app:

1. Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
2. Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' https:;
3. X-Content-Type-Options: nosniff
4. X-Frame-Options: DENY
5. Referrer-Policy: strict-origin-when-cross-origin
6. Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=()

Add these as HTTP response headers. If using Vercel, add to vercel.json. If using Firebase Hosting, add to firebase.json headers config.

Security headers are your app's first line of defense. They're invisible to users but critical for protecting their data. Run this scan after every major deployment to catch regressions.

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Security gaps cause errors. Bugwarden catches them before your users complain.

This tool fixes your headers. Bugwarden monitors your Lovable app for every runtime error and gives you a prompt to fix it — automatically. Set up in 30 seconds.