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The preview shows your app running right in your browser. If it’s blank or stuck on “Preview loading…”, work through these in order.
Preview error state with error details and the Reload preview button

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What to do

1

Restart the preview

Click Restart Server and wait about 20 seconds for it to come back.
2

Refresh the page

Still blank? Refresh your browser (Cmd/Ctrl + R). Your work is saved, so nothing is lost.
3

Open the preview full screen

Some browser extensions — ad blockers and script blockers — stop the preview from loading. Open it in full screen (a new tab) to get around that.
4

Try a private window

If it still won’t load, open Bilt in a private or incognito window.

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Good to know

  • The preview can take two to three minutes to start the first time after a build. That’s normal.
  • It pauses after about 30 minutes of no activity. Interact with it or click Restart Server to wake it back up.
  • To try your app on a real phone, scan the Expo Go QR code in the preview panel — see Get & Share Your App.