Question 1

When should I use underscores instead of dashes?

Accepted Answer

Underscores are conventional in Python variable names (snake_case), database column names, and file names in some systems. URL slugs conventionally use dashes (Google treats dashes as word separators, underscores as word joiners in URLs).

Question 2

Does this affect underscores that already exist in the text?

Accepted Answer

No. Only space characters are converted. Existing underscores remain unchanged. To also merge existing underscores with new ones, use the text cleaning tools.

Question 3

Can I convert underscores back to spaces?

Accepted Answer

This tool does spaces→underscores only. For the reverse, use a find-and-replace with _ as search and (space) as replace, or use the regex-replace tool.

空格转下划线

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