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lowercasesnakecase

lowercase to snake_case Converter

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

To convert lowercase to snake_case, paste your text above and the result updates as you type. user account id 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 LOWERCASE to SNAKECASE

Lowercasing is how you normalise text before comparing it — though for user-facing comparisons, locale matters: Turkish dotted and dotless i famously break naive lowercasing. snake_case is standard in Python, Ruby and SQL, where identifiers are frequently case-insensitive and underscores survive where capitals do not. Converting lowercase to snake_case turns user account id 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 LOWERCASE insteadOpen the full Case Converter

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