Underline text generator — an underline that survives copy and paste

How to use the underline text generator

1. Type or paste your text in Your text.
2. Leave Also mark spaces ticked for one continuous line, or untick it to underline word by word.
3. Look at Styled text; it updates as you type.
4. Press Copy and paste it where you need it.

What it does and when to use it

Underline is normally formatting, which most plain-text fields throw away. This tool builds the line into the text instead. It is handy for a heading in a profile, a highlighted rule in a group chat, or a title inside a code comment. It works on any script, not only Latin letters, because the mark is added after whatever character you type.

For a heavier line try the double underline generator. A line above the letters is the overline generator, and a line through them is the strikethrough generator.

How it works

The tool splits your text into user-visible characters, so an emoji or an accented letter counts as one, and appends U+0332 COMBINING LOW LINE after each one. U+0332 lives in the Combining Diacritical Marks block (U+0300–U+036F). A combining mark has no width of its own; the font draws it under the character before it. Line breaks are never marked, so a multi-line paste keeps its shape.

Worked examples

From the tool’s own function:

• Sale ends today with the default settings becomes S̲a̲l̲e̲ ̲e̲n̲d̲s̲ ̲t̲o̲d̲a̲y̲, one unbroken line.
• The same text with Also mark spaces unticked becomes S̲a̲l̲e̲ e̲n̲d̲s̲ t̲o̲d̲a̲y̲, three separate underlines.
• gyp becomes g̲y̲p̲. The line runs through the tails of g, y and p, as a real underline would in many fonts.

Limits and tips

• Accessibility. A screen reader will usually read the letters, but some announce “combining low line” after each one, which turns a short phrase into a long, confusing list. Search boxes may also fail to find the words. Underline decoration, not information people must read or search for.
• Emoji and wide characters. The mark is attached to them too, but many fonts place it badly under emoji or Chinese and Japanese characters.
• Usernames and URLs do not accept combining marks; keep them plain.
• Everything happens in your browser; the text is not uploaded.