Regex Tester & Validator

This regex matches any line that is exactly 'abc' (due to the ^...$ anchors with multiline mode) or any occurrence of the string 'i10n' anywhere in the text. It is useful for filtering logs or text files where you want to isolate exact 'abc' lines while also flagging mentions of 'i10n', the common abbreviation for internationalization. The alternation combines an anchored line match with an unanchored substring search.