Free Line-by-Line Text Editor

Whitespace cleanup, removal of content inside brackets or parentheses, find-and-replace, filters, prefix and suffix, removal of duplicates and empty lines, then sorting. The result is therefore predictable.

By default, “Keyword” and “keyword” are treated as identical, which suits cleaning keyword or email lists. Uncheck the option to keep them apart when case matters, for example for product codes or IDs.

Check “Regular expression”: the “Find” field is then read as a JavaScript expression (g and i flags). An invalid expression is flagged without changing your text.

Use our case converter, listed in the related tools on this page: it switches text to uppercase, lowercase, title case or sentence case, and handles developer formats such as camelCase or snake_case.