Free developer tools
.env File Checker
Check a .env file for duplicate keys, bad lines, empty values and secrets that look real.
Runs only in your browser. Nothing you paste is sent to us.
- • Line 1: DATABASE_URL contains a password in a URL — never commit this file
- • Line 2: API_KEY is empty
- • Line 3: API_KEY is also on line 2
- • Line 4: not KEY=value
Need more? Try DevOps Readiness
Checklist for shipping: CI, containers, secrets handling, migrations, health checks, monitoring.