Underline
HighA continuous line under the text that travels with it.
Underline text using combining marks — single, double, overline and bold variants — for fields that offer no formatting.
Private by design — your text is processed in your browser and isn’t sent to our server.
A continuous line under the text that travels with it.
Two stacked lines below the letters for stronger emphasis.
A bar drawn above the text instead of below it.
Two lines above the letters — rarer, so check before posting.
A long line through every character, using combining marks.
Mathematical bold serif — heavier and more formal than sans bold.
Outlined blackboard letters that read as hollow text.
Fixed-width typewriter letters with an even rhythm.
Capital shapes at lower-case height — subtle and very readable.
Wide CJK-width letters, the base of the vaporwave look.
Normal letters pulled apart with spaces — stretched, not resized.
Each letter inside an outlined circle — classic bubble text.
Regional-indicator letters that render as coloured tiles.
Neutral sans-serif Unicode letters, close to normal text.
Raised mini letters that sit at the top of the line.
Lowered mini letters; only part of the alphabet exists in Unicode.
A narrower gap between letters for gentler spacing.
Letters inside outlined squares, blocky and technical.
Letters wrapped in parentheses as single characters.
Same letters, reverse order — nothing exotic to break.
Hollow blackboard capitals — light but still bold in shape.
Alternating upper and lower case, applied deterministically.
Spaces replaced with dots — handy for handles and usernames.
Lower case joined by underscores, safe in every username field.
Showing Underline at roughly the size each app uses. Press the preview button on any style card to swap every mock-up instantly.
Instagram bio
u̲n̲d̲e̲r̲l̲i̲n̲e̲
photographer · 1,284 posts
u̲n̲d̲e̲r̲l̲i̲n̲e̲
TikTok profile
u̲n̲d̲e̲r̲l̲i̲n̲e̲
@username
u̲n̲d̲e̲r̲l̲i̲n̲e̲
Discord message
u̲n̲d̲e̲r̲l̲i̲n̲e̲Today at 14:02
u̲n̲d̲e̲r̲l̲i̲n̲e̲
WhatsApp chat
u̲n̲d̲e̲r̲l̲i̲n̲e̲
u̲n̲d̲e̲r̲l̲i̲n̲e̲
14:03
Facebook post
u̲n̲d̲e̲r̲l̲i̲n̲e̲
2 h · Public
u̲n̲d̲e̲r̲l̲i̲n̲e̲
X post
u̲n̲d̲e̲r̲l̲i̲n̲e̲@handle · 1 h
u̲n̲d̲e̲r̲l̲i̲n̲e̲
YouTube channel
u̲n̲d̲e̲r̲l̲i̲n̲e̲
24.1K subscribers · 312 videos
Gaming leaderboard
Username field
Preview only — not affiliated with or endorsed by these platforms. These are neutral mock-ups, and each app draws characters with its own fonts, so the real result can differ slightly.
Every row below shows the word read this converted by this page’s styles.
| Style | Example | Support |
|---|---|---|
| Underline | r̲e̲a̲d̲ t̲h̲i̲s̲ | High |
| Double Underline | r̳e̳a̳d̳ t̳h̳i̳s̳ | High |
| Overline | r̅e̅a̅d̅ t̅h̅i̅s̅ | High |
| Bold Underline | 𝗿̲𝗲̲𝗮̲𝗱̲ 𝘁̲𝗵̲𝗶̲𝘀̲ | High |
| Dotted Below | ṛẹạḍ ṭḥịṣ | Medium |
| Wavy Below | r̰ḛa̰d̰ t̰h̰ḭs̰ | Medium |
The underline here is a combining low line placed after each character. It sits below the letter it follows and joins up with its neighbours, producing a continuous rule under the word. That is quite different from typing underscores between letters, which produces visible gaps and changes the text itself.
The same mechanism gives you a double underline, an overline above the text, and decorative variants such as a dot or a small wave under each character.
On the web, underlined text means a link. Underlining something that is not clickable can be genuinely confusing, especially for people who navigate by scanning. In a bio or a post, bold usually communicates emphasis better and creates no false expectation.
Where underline does work well is in a plain-text document, a spreadsheet header, or a field where you want a visible rule and have no formatting tools.
Underline marks are drawn by the font, so the exact thickness and vertical position vary between devices, and lines occasionally break between characters where glyph widths differ. Text with descenders — g, j, p, q, y — can look crowded, because the rule passes through the descender. If precision matters, real formatting is better.
The mark is drawn per character, so if the font gives adjacent glyphs different widths the segments may not meet exactly. It looks continuous in most fonts and slightly broken in a few.
Visually, yes — underscores sit between letters and create gaps, and they change the actual text. Combining marks leave the letters intact and draw a rule beneath them.
Largely. The letters are unchanged, so plain-text search can still match the word, though exact-match comparisons that include the marks will fail.
Discord supports underline with double underscores around the text. WhatsApp has no underline, which is exactly why this tool is useful there.
Sparingly. Readers associate underline with links, so use it for a heading rather than for random emphasis, and prefer bold when you simply want attention.
Closely related tools, chosen for this page rather than generated from a list.