How to Deploy Replit Apps Securely
Deploying from Replit to production requires verifying that secrets are in the Secrets tab, the repl visibility is appropriate, and your application has proper security hardening.
Find security issues automatically before attackers do.
Follow These Steps
Move all credentials to Replit Secrets
Ensure no API keys are hardcoded in any files.
grep -rn "sk-\|api_key\|password" . --include="*.py" --include="*.js" --include="*.ts"Set repl visibility appropriately
If your repl contains server-side code, consider setting it to private.
Add security headers in your server
Configure security middleware for your web framework.
// Express
import helmet from 'helmet'
app.use(helmet())Add rate limiting
Protect public endpoints from abuse.
import rateLimit from 'express-rate-limit'
app.use(rateLimit({ windowMs: 15 * 60 * 1000, max: 100 }))Deploy and verify
Use Replit Deployments and scan the URL with VAS.
Replit deployments get .replit.app domains with automatic HTTPS.
What You'll Achieve
Your Replit app is deployed with secrets properly stored, appropriate visibility, security headers, and rate limiting configured.
Common Mistakes to Avoid
Mistake
Leaving the repl public with server-side code visible
Fix
Set the repl to private if it contains backend logic. Use Replit Secrets for all credentials regardless of visibility.
Frequently Asked Questions
Are Replit deployments always public?
Deployed Replit apps are accessible by URL, but the source code is only visible if the repl itself is public. Keep the repl private to protect your code.
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VAS automatically scans your deployed app for the security issues covered in this guide. Get actionable results in minutes.
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