Underline Text Generator

How to underline text online

1. Type or paste your text in the box above.
2. The list shows the underline styles: Underline, Double underline, Bold underline, plus Strikethrough and Slash.
3. Click “Copy” next to the style you want and paste it into your post, bio or message.

Need to underline only one or two words? Select them in the editor and press the U button. The rest of your text stays normal, and the LinkedIn preview shows the result right away.

Underline styles you can copy

• Underline – u̲n̲d̲e̲r̲l̲i̲n̲e̲ – the classic look, great for a call to action.
• Double underline – u̳n̳d̳e̳r̳l̳i̳n̳e̳ – stronger emphasis for titles.
• Bold underline – 𝗯̲𝗼̲𝗹̲𝗱̲ – bold and underlined in one.
• Strikethrough – s̶t̶r̶i̶k̶e̶ – for old prices, jokes and corrections.
• Slash – s̸l̸a̸s̸h̸ – a lighter crossed-out effect.

How does underlined text work?

Social apps don’t have an underline button. This tool adds a special Unicode “combining” mark (U+0332) under every character. The mark travels with the text, so the underline stays when you copy and paste it into almost any app or website. Spaces are left without a line so words stay easy to read.

Where you can use underlined text

• Instagram – bio, captions and comments
• LinkedIn – posts, comments, headline and About section
• Facebook – posts, comments and Messenger
• X (Twitter), TikTok, Discord and WhatsApp
• Emails, notes and documents where formatting is not available

Underline vs. bold vs. strikethrough

Use bold to grab attention, underline to point to one action (“s̲i̲g̲n̲ ̲u̲p̲ ̲t̲o̲d̲a̲y̲”) and strikethrough to show a change, like an old price: $̶4̶9̶ now $29. Mixing too many styles in one post makes it hard to read – one or two highlights are enough.

Good to know

• Combining marks can look slightly different from one font or phone to another, but they display on all modern devices.
• Platform search may not match underlined words, so keep hashtags and keywords in normal text.
• Screen readers may announce the extra marks; keep underlined text short.

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Underline text FAQ