Railway App Crashes After Deploy
Quick Answer
How do I fix Railway App Crashes After Deploy?
Usually missing environment variables or the app crashing on startup due to a runtime error. Start with "Check logs" before making broader code changes.
Fix signals
- What this answers
- Why railway app crashes after deploy happens and what to change first.
- Fastest move
- Check logs
- Use this page if
- Deploy succeeds but app crashes
If this keeps happening
Open the next decision, not just the patch
Use these when the current fix is helpful, but the real answer is a better tool choice, a cleaner workflow layer, or a more trustworthy launch path.
Deploy hub
Open this when the bug is really about production setup, not only one hosting-specific fix.
Open this next →
Production monitoring guide
Open this when you need a cleaner operational path after the app goes live.
Open this next →
Tool picker
Open this when hosting pain is making you rethink the broader stack decision.
Open this next →
Cursor review
Open this when deploy pain is pushing you toward a more code-first workflow with tighter control.
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Lovable reviews
Open this when production friction is making you reconsider the tradeoff between generation speed and later cleanup cost.
Open this next →
Quick Fix Summary
| Most likely cause | Usually missing environment variables or the app crashing on startup due to a runtime error. |
| Fastest fix | Check logs |
| Use this page if | Deploy succeeds but app crashes |
You're in the right place if...
- !Deploy succeeds but app crashes
- !Service keeps restarting
- !502 Bad Gateway errors
Why this happens
Usually missing environment variables or the app crashing on startup due to a runtime error.
Fix
Check logs
Railway Dashboard → your service → Logs. Read the crash message.
Add missing env vars
Railway → Variables → add all vars from .env. Most crashes are missing DATABASE_URL or API keys.
Prevent this next time
Add ALL environment variables before the first deploy. Test locally with production-like env vars.
Frequently Asked Questions
Railway Dashboard → your service → Logs. The crash message is usually at the bottom.
Missing environment variables. Check that every variable in your .env file is also in Railway Variables.
Related fixes
Railway Deployment Failing
Vercel Shows a Red X and the Deploy Never Goes Live
Supabase Too Many Connections Error
Lovable App Shows a Blank Screen After Deploy
Lovable Vercel Build Failed
Lovable Images Work in Preview but Break After Deploy