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camelcasesnakecase

camelCase to snake_case Converter

Convert camelCase text to snake_case — one line or a whole list at once.

To convert camelCase to snake_case, paste your text above and the result updates as you type. userAccountId becomes user_account_id. Word boundaries are detected from the existing casing, so an identifier does not need separators to be split correctly. snake_case is standard in Python, Ruby and SQL, where identifiers are frequently case-insensitive and underscores survive where capitals do not.

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About converting CAMELCASE to SNAKECASE

camelCase is the convention for variables and functions in JavaScript, Java and C#. snake_case is standard in Python, Ruby and SQL, where identifiers are frequently case-insensitive and underscores survive where capitals do not. Converting camelCase to snake_case turns userAccountId into user_account_id; acronyms are the awkward case in every direction, since "userID" and "userId" split differently and only one of them round-trips.

Convert SNAKECASE to CAMELCASE insteadOpen the full Case Converter

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