Secure your Replit applications with these essential practices. From Secrets management to deployment protection.
Verify your app follows these best practices automatically.
Replit makes development accessible, but production apps need security attention. Follow these practices to deploy secure applications from Replit.
Never put API keys or passwords in your code. Use Replit's Secrets feature.
Add secrets in the Secrets panel (lock icon), access via os.getenv() or process.env
When using Replit AI, never paste real API keys or passwords. Use placeholder values.
Use 'YOUR_API_KEY' placeholders, add real values via Secrets
Replit Database is accessible from your code. Ensure your application logic restricts access appropriately.
Implement authorization checks before all database operations
Public Repls show your code to everyone. Use Private Repls for proprietary code.
Set Repl to Private in Settings for sensitive projects
Replit AI can generate insecure code. Review all AI suggestions before using them.
Focus review on authentication, database queries, and input handling
Ensure your deployed Repl uses HTTPS and redirects HTTP traffic.
Replit handles HTTPS for custom domains, verify it's enforced
Public Repls expose all code, including secrets
Always use Replit Secrets, never hardcode credentials
Anyone can see and copy your code and configuration
Set Repl to Private for proprietary or client projects
Replit AI may generate insecure authentication patterns
Use established auth libraries, review all auth code manually
Following best practices is the first step. Verify your app is actually secure with a comprehensive security scan.
Scan Your App FreeYes, Secrets are encrypted and not visible in your code or version history. They're only exposed to your running Repl. However, if someone forks a public Repl, they don't get your Secrets.
If your Repl is Public, yes. Set it to Private if you don't want others to see your code. Public Repls are searchable and forkable.
Use Replit Deployments with Secrets properly configured. Enable Autoscale or Reserved VM deployments for production traffic. Verify HTTPS is enforced.
Last updated: January 2026