404 when you refresh a page? Add an SPA rewrite

Your app works when you click around, but paste yoursite.com/dashboard into a new tab, or hit refresh, and you get a 404. This is common with single-page apps exported from Lovable, Bolt or v0 and hosted on static hosts like Netlify, Vercel or Cloudflare Pages.

The browser asks the server for /dashboard, but only index.html exists, so the host has nothing to send.

• Netlify: add a _redirects file with /* /index.html 200.
• Vercel: add a rewrite in vercel.json sending all paths to /index.html.
• Test it: open a deep link in a private window, not just the homepage.

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