.env Diff & Comparison Tool
Compare two .env and dotenv files online. Spot missing variables, differing secrets, and added configuration keys between environments.
Enter original and modified text above to compute diff.
How .env Diff Works
- Parses both dotenv files into key-value maps.
- Compares keys to find additions, deletions, and changed values.
- Outputs side-by-side or unified diff comparison.
Example Input & Output
Compares environment variables key by key, highlighting missing variables, changed values, and newly added secrets.
PORT=3000 NODE_ENV=development DEBUG=true DATABASE_URL=postgres://localhost:5432/dev_db
PORT: 3000 -> 8080 NODE_ENV: development -> production DEBUG: true -> false DATABASE_URL: postgres://localhost:5432/dev_db -> postgres://db.prod:5432/prod_db + SENTRY_DSN: https://example.com/sentry
Common Use Cases
Staging vs Production Env Audit
Ensure all required environment variables in production exist in staging and .env.example.
Deployment Troubleshooting
Verify that new release variables have been configured across servers.
Key Specifications & Gotchas
Masking Sensitive Secrets
Always use dummy tokens when diffing real production secrets.
Frequently Asked Questions
How do I compare two .env files?
Paste your baseline .env file on the left and comparison file on the right; differences and missing keys are displayed immediately.
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