Underline Text Generator
The underline text generator adds a line under each letter, such as u̲n̲d̲e̲r̲l̲i̲n̲e̲, plus double, wavy, dotted and over-line versions.
Underline Character Cost Calculator
An underline is not free: each underlined letter carries a hidden mark, and over-and-under lines carry 2. Type your text and pick a line style to see how many characters apps really count, and whether it still fits a Discord nickname, an Instagram name or bio, a TikTok bio or a post on X.
7 Underline Styles Compared
Unicode has a mark for every kind of line. Switch between them with your own text.
How a Combining Underline Attaches
A combining mark has no width of its own; it draws under the character before it. That is why the underline follows each letter you type. Click a tile.
Why the Line Has Gaps (and How to Fix It)
Each letter gets its own short line, and some fonts leave a small gap between letters. These fixes help.
Where Underlined Text Works
Most apps have no underline button at all. Pick one to see how Unicode underline behaves there.
From Typewriters to Unicode: Underlining Through Time
The underline was emphasis long before bold existed on screens.
Underline Text FAQs
Can I underline text on Instagram?
Yes, paste combining-underline text into a caption or bio; Instagram has no underline button.
Do spaces get underlined?
No, spaces stay plain so words stay separate. Use a non-break space if you want a continuous line.
Does underlined text use more characters?
Yes, each underlined letter adds 1 hidden mark, and over-and-under lines add 2. The cost calculator above shows the real count.
How do I underline text in Discord?
Wrap words in double underscores, like __this__, in messages. Use Unicode underline for nicknames and server names.
What is the difference between underline and overline?
Underline draws below the letters (U+0332), overline draws above them (U+0305). The over-and-under style uses both.
Why does the underline look broken on my phone?
Your font draws a short line per letter without joining them. Double underline and code blocks usually look smoother.
Related tools
Browse every tool in Text Effects or go back to the Fancy Text Generator.