Paste actual and example files
Either file may be empty; both stay local.
Three explicit steps
Paste, validate, compare
Inspect structural issues
Line numbers identify invalid names, quotes, expansion and duplicates.
Copy redacted names
Each sorted key is emitted as NAME= with no value.
Environment-file review
Useful before onboarding, CI or deployment configuration
- Find a missing example key.
- Spot an accidental duplicate.
- Reject command substitution.
- Share a redacted key skeleton.
Names only · values hidden
Check env structure without exposing values
Validate a narrow dotenv subset, report every duplicate and compare names with .env.example locally.