CONSTANT_CASE Converter
Convert labels to CONSTANT_CASE for environment variables, feature flags, and shared constants.
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About CONSTANT_CASE Converter
CONSTANT_CASE uppercases words and joins them with underscores. It is common for environment variables, enum members, compile-time constants, and feature flags.
How to Use CONSTANT_CASE Converter
Paste a variable, label, or setting name. Review the uppercase underscore-separated result. Copy it into an env file, config schema, enum, or docs page.
When to Use CONSTANT_CASE Converter
Configuration: Name environment variables and secrets. Enums: Format stable members in generated code. Feature flags: Keep flag names obvious in dashboards and logs.
Why Use This CONSTANT_CASE Converter?
The loud uppercase shape makes constants easy to spot and keeps config naming consistent across teams.
Unicode vs HTML formatting
CONSTANT_CASE is the uppercase version of snake_case. Use it when the value is intended to be visually distinct from local variables.
Platform compatibility
Use CONSTANT_CASE for .env keys, CI variables, enum values, build flags, and public constants in many codebases. Avoid it for long prose or regular object fields.
How to use
1. Paste a variable, label, or setting name.
2. Review the uppercase underscore-separated result.
3. Copy it into an env file, config schema, enum, or docs page.
Frequently asked questions
CONSTANT_CASE vs UPPERCASE?
UPPERCASE changes letters only. CONSTANT_CASE also adds underscores between words.
Should all constants use CONSTANT_CASE?
Follow your language and team style guide. Some projects reserve it for env vars and module-level constants.
Can I convert camelCase to CONSTANT_CASE?
Yes. The converter detects common camelCase word boundaries before joining words with underscores.