Turn user_first_name into User First Name, or strip underscores completely.
Underscores are replaced with the option you choose: a space, nothing, a hyphen or a dot. Leading and trailing underscores, such as those in private names or dunder methods, can be dropped, and runs of several underscores can be treated as one separator.
Tick capitalize each word to produce a presentable label from a database column or variable. Each line of the input is handled on its own, so you can convert a whole list of identifiers in one step.
The snake case converter creates underscore names. This tool removes them or swaps them for readable separators.
With the run option on they are treated as a single separator. Turn it off to replace each underscore individually.
Use the camelCase Converter instead, which joins the words and capitalizes each one after the first.