Single underline
u̲n̲d̲e̲r̲l̲i̲n̲e̲ t̲h̲i̲s̲ t̲e̲x̲t̲
Type text, choose a single or double underline, and copy the result.
The underline uses Unicode combining marks, not document formatting. Its position can vary by font and app.
u̲n̲d̲e̲r̲l̲i̲n̲e̲ t̲h̲i̲s̲ t̲e̲x̲t̲
u̳n̳d̳e̳r̳l̳i̳n̳e̳ t̳h̳i̳s̳ t̳e̳x̳t̳
Letters and numbers receive a combining underline mark. Spaces, line breaks and emoji are preserved, although different apps may render the line differently.