Stop Pasting Production Credentials into Cloud Diff Checkers.

Compare staging and production environments, detect missing keys, calculate Shannon entropy (H(X) > 3.8), and generate sanitized .env.example templates with 100% in-browser client-side execution. Zero network telemetry.

Load Scenario Preset:

Total Keys (A / B)

11 / 13

Matching Keys

Value Mismatches

Missing in Right

Missing in Left

High-Entropy Secrets

12detected

(11 keys)

(13 keys)

# Production Deployment Environment
NODE_ENV=production
PORT=8080
NEXT_PUBLIC_APP_URL=https://acme.aventinelabs.com

# Supabase Auth & Database
NEXT_PUBLIC_SUPABASE_URL=https://prod-cluster.supabase.co
NEXT_PUBLIC_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6InByb2QtY2x1c3RlciIsInJvbGUiOiJub24iLCJpYXQiOjE2NzgwMDAwMDAsImV4cCI6MTk5MzU3NjAwMH0.prod_anon_signature_abc
SUPABASE_SERVICE_ROLE_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6InByb2QtY2x1c3RlciIsInJvbGUiOiJzZXJ2aWNlX3JvbGUiLCJpYXQiOjE2NzgwMDAwMDAsImV4cCI6MTk5MzU3NjAwMH0.secret_master_service_role_key
DATABASE_URL=postgresql://postgres:SecureProdPassword99!@db.prod-cluster.supabase.co:5432/postgres?pgbouncer=true

# Stripe Billing (Live Production)
STRIPE_SECRET_KEY=sk_live_51MzABCD9876543210zyxwvutsrqponmlkjihgfedcba0987654321ZYXWV
NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_live_51MzABCD9876543210zyxwvutsrqponm
STRIPE_WEBHOOK_SECRET=whsec_9876543210abcdef0123456789abcdef0123456789abcdef0123456789ab

# Production Monitoring & Email
SENTRY_DSN=https://abc123def456@o123456.ingest.sentry.io/789012
RESEND_API_KEY=re_live_99214481abcdef1234567890
LOG_LEVEL=error

Variable Discrepancy Matrix (14 variables displayed)

Shannon Entropy Scale: < 3.0 Low • 3.0–3.8 Med • > 3.8 Secret

Status	Variable Key	Left: .env.local (Dev)	Right: .env.production (Prod)	Entropy / Security
MISMATCH	DATABASE_URL	••••••••••••	••••••••••••	Database URI with Embedded PasswordH=4.48 b/c
+ MISSING RIGHT	DEBUG	true	<not defined>	2bits/char
MISMATCH	LOG_LEVEL	debug	error	2.32bits/char
MISMATCH	NEXT_PUBLIC_APP_URL	••••••••••••	••••••••••••	3.95bits/char
MISMATCH	NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY	••••••••••••	••••••••••••	High-Entropy Secret VariableH=5.02 b/c
MISMATCH	NEXT_PUBLIC_SUPABASE_ANON_KEY	••••••••••••	••••••••••••	JSON Web Token (JWT)H=5.51 b/c
MISMATCH	NEXT_PUBLIC_SUPABASE_URL	••••••••••••	••••••••••••	4.02bits/char
MISMATCH	NODE_ENV	••••••••••••	••••••••••••	3.12bits/char
MISMATCH	PORT	3000	8080	1bits/char
+ MISSING LEFT	RESEND_API_KEY	<not defined>	••••••••••••	Resend API KeyH=4.22 b/c
+ MISSING LEFT	SENTRY_DSN	<not defined>	••••••••••••	High-Entropy Random TokenH=4.73 b/c
MISMATCH	STRIPE_SECRET_KEY	••••••••••••	••••••••••••	Stripe Live Secret KeyH=5.45 b/c
MISMATCH	STRIPE_WEBHOOK_SECRET	••••••••••••	••••••••••••	Stripe Webhook Signing SecretH=4.2 b/c
+ MISSING LEFT	SUPABASE_SERVICE_ROLE_KEY	<not defined>	••••••••••••	JSON Web Token (JWT)H=5.46 b/c

100% Client-Side Zero-Telemetry Architecture

Zero Cloud Logging • Zero Secret Harvesting • RFC Compliant AST Parsing

Verify independently: Open Chrome DevTools > Network tab. All parsing, Shannon entropy computations, and diff matrices execute locally in browser memory under strict CSP (connect-src 'self'). Your production credentials never leave your device.

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