Replit makes it easy to build and deploy. Here are the production gaps that appear most often in Replit-deployed apps — and what to check before you share the URL.
Default stack: PostgreSQL or SQLite · Replit Auth or custom
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Replit Secrets are the right place for API keys, but console.log statements that print request objects or environment variables can expose them in Replit's output panel.
Replit Repls are publicly accessible by URL unless explicitly restricted. Auth checks in the frontend don't protect your backend API routes.
Free Replit plans restart the container, wiping in-memory or local SQLite data. Production apps need a persistent database, not filesystem storage.
Replit-generated apps rarely include rate limiting. With a public URL and no throttling, your app is trivially DoS-able.
Check these before you share the URL publicly.
No console.log of request objects or environment variablescritical
Backend API routes have server-side auth checkscritical
Production data on a persistent database (not local SQLite)critical
Rate limiting on public-facing endpoints
Repl is not set to public if it serves sensitive datacritical
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