camelCase to CONSTANT_CASE converter
Turn camelCase variable names into the all-caps, underscore-separated style used for constants.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter camelcase names (one per line or inside text).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Each camelCase name is split into words at every change from a lowercase letter or digit to a capital, and before the last capital of an acronym that is followed by a lowercase letter. The words are then upper-cased and joined with underscores (_). Symbols and spaces around the names are left as they are. Example: maxRetryCount becomes MAX_RETRY_COUNT.
Example
Result: CONSTANT_CASE result: MAX_RETRY_COUNT API_BASE_URL DEFAULT_TIMEOUT_MS; Names processed: 3.
maxRetryCount apiBaseUrl defaultTimeoutMs
MAX_RETRY_COUNT API_BASE_URL DEFAULT_TIMEOUT_MS
Limits and caveats
- A name with no capital to mark the word break, such as username or an Arabic name, cannot be split.
- Every word in the pasted text is converted, including keywords and library names, so review the result before pasting it into code.
Questions about this tool
What is CONSTANT_CASE?
Capitalised words separated by underscores, also called SCREAMING_SNAKE_CASE, commonly used for constant names in JavaScript, Java and Python.
How are digits handled?
A digit stays attached to the letters before it, so apiKeyV2 becomes API_KEY_V2 and item2Count becomes ITEM2_COUNT.
Are standalone numbers counted as names?
No, in apiKeyV2 = 1 only the name changes, the 1 stays as it is, and one name is counted.