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ERR_TOO_MANY_REDIRECTS after adding Cloudflare? Check your SSL mode

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Source checked 5 Oct 2026 · Published 23 Oct 2026 · Last reviewed 23 Oct 2026 · By Ctrl+Z Therapy (how we test)

The short answer

If your domain's encryption mode in Cloudflare is set to Flexible, Cloudflare sends unencrypted requests to your origin server (your host) over HTTP. Redirect loops occur if your host automatically redirects all HTTP requests to HTTPS. Vercel does: its automatic HTTP-to-HTTPS redirect can't be disabled.

What to do

  1. In the Cloudflare dashboard, go to the SSL/TLS Overview page.
  2. Choose Full (strict), with a valid certificate on the origin.
  3. Cloudflare's own warning: if your origin forces HTTPS, do not use Flexible mode.

Good to know

  • Vercel does not recommend placing a reverse proxy in front of a Vercel project.
  • Lovable's custom domains need DNS only, without Cloudflare's proxy.

Source

Checked on 5 Oct 2026. Prices, limits and settings change, so check the source before you rely on them.

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