Underline Text Generator

Add underlines to your text instantly using Unicode combining characters. Works on social media, Discord, and anywhere that supports Unicode. Just type and copy!

100% client-side. Your data never leaves your browser.

Both Styles Preview

Single Underline
H̲e̲l̲l̲o̲ ̲W̲o̲r̲l̲d̲
Double Underline
H̳e̳l̳l̳o̳ ̳W̳o̳r̳l̳d̳

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2 Underline Styles

Choose single underline or double underline styles. Both use standard Unicode combining characters that work across platforms without HTML or CSS.

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Copy & Paste

One-click copy to clipboard. Use underlined text on Twitter, Discord, Instagram, TikTok, Reddit, or anywhere that supports Unicode characters.

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100% Private

Everything runs in your browser. No data is sent to any server. Your text stays completely private and secure.

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Frequently Asked Questions

How does the underline text generator work?
The tool adds a Unicode combining underline character after each character in your text. For single underline, it uses U+0332 (combining low line). For double underline, it uses U+0333 (combining double low line). These are standard Unicode characters, not HTML or CSS formatting, so they work on any platform that supports Unicode.
Can I use underlined text on social media?
Yes! Underlined text works on most social media platforms including Twitter/X, Facebook, Instagram bios and captions, Discord, TikTok, Reddit, YouTube comments, and more. Simply copy the underlined text and paste it into your post, bio, or message.
What is the difference between single and double underline?
Single underline adds one line below each character (like this: H̲e̲l̲l̲o̲). Double underline adds two parallel lines below each character (like this: H̳e̳l̳l̳o̳). Single underline has slightly better compatibility across devices, while double underline provides a bolder visual effect.
Does underlined text work on all devices?
Underlined text uses standard Unicode combining characters supported on virtually all modern devices, operating systems, and browsers. The exact rendering may vary slightly depending on the font being used, but the underline will be visible on iPhones, Android phones, Windows, Mac, and Linux.
Is there a character limit for underlining text?
No, there is no character limit. You can underline as much text as you want. The conversion happens instantly in your browser with no server processing. Keep in mind that the output text will be roughly twice as long as the input since each character gets an additional combining character appended.