What is CONSTANT_CASE?

CONSTANT_CASE — also called SCREAMING_SNAKE_CASE — writes words in uppercase separated by underscores, like 'MAX_RETRY_COUNT'. It is the convention for environment variables and named constants in many languages.

What input formats are supported?

It handles plain words, camelCase, PascalCase, snake_case and kebab-case, splitting them into words before joining with underscores in uppercase.

Is my text uploaded anywhere?

No — the conversion happens entirely in your browser and nothing is sent over the network.

Constant Case Converter

Turn any text into 'CONSTANT_CASE' for env vars and constants.

CONSTANT_CASE converter

Paste any text — plain words, camelCase, or kebab-case — and get CONSTANT_CASE output such as MAX_RETRY_COUNT, the standard format for environment variables and named constants.

Everything runs in your browser, so your code never leaves your machine.