Skip to content
Convertto
snakecaseconstantcase

snake_case to CONSTANT_CASE Converter

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

To convert snake_case to CONSTANT_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. CONSTANT_CASE marks compile-time constants and environment variables across nearly every language.

Runs in your browser

About converting SNAKECASE to CONSTANTCASE

snake_case is standard in Python, Ruby and SQL, where identifiers are frequently case-insensitive and underscores survive where capitals do not. CONSTANT_CASE marks compile-time constants and environment variables across nearly every language. Converting snake_case to CONSTANT_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 CONSTANTCASE to SNAKECASE insteadOpen the full Case Converter

Share this converter

Related tools

Naming Convention ConverterConvert an identifier between every common naming convention at once.Add Line NumbersPrefix every line with a sequential number, with a custom start, separator and zero padding.Columns to Lines ConverterSwitch between a delimited single line and one item per line, in either direction.Text Wrap & TruncateHard-wrap text at a line width, or truncate it to a maximum length.Whitespace RemoverStrip extra spaces, tabs, blank lines and trailing whitespace from any text.Acronym GeneratorTurn a phrase into an acronym or initialism, with control over small words and separators.