Fix: Replit Deployment Not Working
Quick Answer
Check that your app listens on port 3000 (or the port Replit provides via process.env.PORT). Most deployment failures are caused by wrong port configuration.
Quick Fix Summary
| Issue | Deployment issues |
| Fastest fix | Use the correct port |
| Use this page if | Deployment shows 'Failed' status |
Symptoms
- !Deployment shows 'Failed' status
- !App runs in Replit but fails on deployment
- !Custom domain not connecting
- !App is slow after deployment
Step-by-Step Fix
Use the correct port
Your app must listen on the port Replit provides. Use: const port = process.env.PORT || 3000; This is the most common deployment fix.
Check the .replit configuration
Ensure your .replit file has the correct run and build commands. Open the .replit file and verify the 'run' field.
Review build logs
Check the deployment logs for specific error messages. Common issues: missing dependencies, build script errors, or memory limits.
Add a health check endpoint
Replit's deployment checks if your app is responsive. Add a GET / endpoint that returns 200 OK.
Frequently Asked Questions
Replit Deployments require a paid plan. The free tier only provides development hosting which may sleep.
Related
Weekly Signals
Get the next fix, switch, or warning before it hits your build.
Join builders getting the community signals, fix patterns, and tool shifts that matter before they show up everywhere else.
Follow the signals →