Where can I use underlined text?

In bios, captions, usernames and comments on Instagram, TikTok, Twitter/X, Discord and most other platforms that accept unicode.

Will it always render correctly?

It works in most modern apps. A few older platforms may render combining marks differently, so check on your target app.

Where can I use underlined text?

In bios, captions, usernames and comments on Instagram, TikTok, Twitter/X, Discord and most other platforms that accept unicode.

Will it always render correctly?

It works in most modern apps. A few older platforms may render combining marks differently, so check on your target app.

Underline Text Generator

Underline text anywhere with unicode.

Text

Underlined

F̲o̲n̲t̲i̲l̲y̲

Create u̲n̲d̲e̲r̲l̲i̲n̲e̲d̲ text that pastes into bios and captions.

What is an Underline Text Generator?

An underline text generator adds a line beneath your letters using unicode combining marks, producing underlined text that stays underlined when you copy and paste it. It works in plain-text fields like bios and captions that normally have no underline button.

Features

Real unicode underline that survives copy-paste.
Instant preview as you type.
Works in plain-text fields everywhere.
Free and private — runs in your browser.

How to Use the Underline Text Generator

Type or paste your text into the box.
The underlined version appears immediately.
Click to copy the result.
Paste it into your bio, caption or message.

Benefits

Underlining draws the eye and signals emphasis, but most social platforms don't offer it. This tool lets you highlight key words in a bio, make a caption stand out, or add structure to plain-text fields — without screenshots or images.

Use Cases

Emphasis in Instagram and TikTok bios.
Standout captions and comments.
Section labels in plain-text profiles.
Highlighting links or keywords in posts.

Conclusion

Fontily's Underline Text Generator gives you copy-paste underlined text for any plain-text field. Type above and copy your underlined text — free, private and instant.

Frequently asked questions

Each character is paired with a unicode combining low-line mark, so the underline travels with the text when you copy and paste it — no rich-text editor needed.