Platform Engineering
Environment Variable Naming Checker
Enter an environment variable name to check POSIX validity, detect reserved name conflicts, and validate against the selected naming convention.
No data is transmitted — everything runs locallyTool
About this tool
Environment Variable Naming Checker
The Environment Variable Naming Checker validates env var names against POSIX rules, 12-Factor App conventions, Kubernetes secret injection patterns, and reserved prefix conflicts.
• Validate a new environment variable name before adding to a 12-Factor application
• Check that a Kubernetes secret key name is valid for env var injection
• Detect POSIX reserved prefix conflicts in proposed variable names
• Verify dotenv file key format before committing to a repository
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Sponsored tool. This tool is brought to you by our partners. No data is collected or transmitted.
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FAQ
What does this tool tell you?
The Environment Variable Naming Checker validates env var names against POSIX rules, 12-Factor App conventions, Kubernetes secret injection patterns, and reserved prefix conflicts.
What affects the result most?
POSIX env var naming: [A-Z_][A-Z0-9_]* — lowercase technically valid but convention is uppercase. Reserved prefixes: variables starting with _ are reserved by POSIX; HOME, PATH, USER, SHELL are system. 12-Factor App convention: config in env vars, not files — naming patterns for service configuration.
How should I use the result?
Treat the tool's output as a first-pass check, not a proof of correctness. A clean pass means no issues in the patterns this tool recognizes; a failure points to a specific problem you can investigate in your source. The underlying spec is the authoritative source for edge cases.