Blank Page After Deploy to Vercel/Netlify
Your app works perfectly in development but shows a blank white page after deploying to Vercel or Netlify. No errors in the browser console, just whitespace.
The deployment log shows 'Build succeeded' but the page won't render anything.
Error Messages You Might See
Common Causes
- Build fails silently but deploy continues - check build logs carefully
- Environment variables missing in deployment platform
- Node version incompatibility between local and deployment
- CSS/images not bundled properly in build
- JavaScript runtime error in root component during hydration
How to Fix It
Check full build logs in Vercel/Netlify deployment: look for warnings and errors
Add environment variables in deployment platform settings that exist in local .env.local
Test production build locally: npm run build && npm run start
Check browser DevTools Network tab - are CSS and JS files loading?
Look for hydration mismatches in console warnings
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Get HelpFrequently Asked Questions
How do I see detailed build errors in Vercel?
Go to Deployments > [deployment] > Logs. Check both Build and Runtime logs
Why would it work locally but fail on deploy?
Missing env vars, different Node versions, or unsupported packages in serverless environment
How do I test production build locally?
npm run build then npm run start, then visit localhost:3000