Snake_case writes compound words in lowercase separated by underscores, like 'my_variable_name'. It is common in Python, Ruby and database column names.

How does it split camelCase words?

A word boundary is inserted before each uppercase letter, so 'myVariableName' becomes the words 'my', 'variable', 'name', which join with underscores to 'my_variable_name'.

Is my text uploaded anywhere?

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

Camel Case to Snake Case Converter

Turn 'camelCase' identifiers into 'snake_case' instantly.

camelCase to snake_case

Paste any camelCase or PascalCase identifier such as myVariableName and get the equivalent snake_case string my_variable_name instantly.

Useful when moving JavaScript or TypeScript variable names into Python, SQL, or config keys. Everything runs in your browser, so your code never leaves your machine.