What to check
Review each key, value, quote, comment, and duplicate entry. Make sure required variables exist and that values are formatted the way your framework expects.
Safe handling
Do not paste production secrets, private keys, tokens, passwords, or customer data into online tools unless you understand the processing mode. Use sample values when checking structure.
Common mistakes
- Duplicate keys with different values.
- Spaces around equals signs when a parser does not support them.
- Unescaped line breaks in quoted values.
- Committing real secrets to source control.
FAQ
Does a validator prove the app config is correct?
No. It can check file structure, but the application still decides what each variable means.
Should secrets be logged?
No. Redact secrets from logs, screenshots, and bug reports.