Prerender.io – Lovable (Cloudflare Worker)

A Cloudflare Worker that proxies your Lovable app and routes bot traffic through Prerender.io for SEO rendering.

How it works

• Regular users are proxied transparently to your Lovable app (LOVABLE_UPSTREAM)
• Search engine bots and crawlers are routed to Prerender.io for server-side rendered HTML
• Canonical tags are injected/replaced to point to the public URL
• Redirects from the upstream are rewritten to use your public hostname

Setup

1. Deploy worker.js as a Cloudflare Worker
2. Set the following environment variables in your Worker settings:

Variable	Description
LOVABLE_UPSTREAM	Your Lovable app URL (e.g. https://yourapp.lovable.app)
PRERENDER_TOKEN	Your Prerender.io token

Authentication / OAuth

Lovable uses Supabase for authentication. When your app is served from a custom domain via this worker, the OAuth callback URL seen by the browser will be your custom domain (e.g. https://example.com/auth/callback), not the original Lovable URL.

For auth to work correctly you need to add your custom domain to the allowed redirect URLs in the Supabase project that backs your Lovable app:

1. Go to your Supabase dashboard
2. Open the project linked to your Lovable app
3. Navigate to Authentication → URL Configuration
4. Add your custom domain to Redirect URLs (e.g. https://example.com/**)

Without this step, Supabase will reject the OAuth callback and users will not be able to log in.

Note: You cannot do this through Lovable's UI directly — you need access to the underlying Supabase project.

Requirements

• Cloudflare Workers (supports HTMLRewriter)