Prerender.io – Lovable (Cloudflare Worker)

Cloudflare Workers that route bot traffic through Prerender.io for SEO rendering on Lovable apps.

Which worker to use

File	For whom
worker-subscriber.js	Lovable paid subscribers with a custom domain set up in Lovable's dashboard
worker-custom-domain.js	Free Lovable users who proxy their yourapp.lovable.app through Cloudflare to serve it from a custom domain

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worker-subscriber.js (paid subscribers)

For Lovable paid plan users who configured their custom domain directly in Lovable. Your domain already points to Lovable's servers — this worker sits in front and routes crawler traffic to Prerender.io. No proxying needed.

Setup

1. Deploy worker-subscriber.js as a Cloudflare Worker on your custom domain
2. Set the following environment variable:

Variable	Description
PRERENDER_TOKEN	Your Prerender.io token

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worker-custom-domain.js (free users / custom proxy)

For free Lovable users who want to serve their app from a custom domain by proxying through Cloudflare. All traffic is forwarded to your Lovable app URL, with bots routed to Prerender.io and canonical tags injected.

Setup

1. Deploy worker-custom-domain.js as a Cloudflare Worker on your custom domain
2. Set the following environment variables:

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 Lovable dashboard:

1. Go to your Lovable dashboard
2. Navigate to Cloud → Users → Authentication Settings → Advanced
3. Add your custom domain to the URI allow list (e.g. https://example.com/**)

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

Requirements

• Cloudflare Workers
• worker-custom-domain.js additionally requires HTMLRewriter support (available on all Cloudflare Workers plans)