---
title: "Underline Icon | Free Download PNG & SVG | Iconoir Regular"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/underline--29591
canonical_url: "https://www.streamlinehq.com/icons/download/underline--29591"
summary: "Clean line icon of a U-shaped curve above a horizontal line. Used for text underlining and formatting controls."
---

# Underline icon

The Underline icon shows a rounded U-shaped curve above a horizontal line. Drawn in the line style on a 16px grid with a 1px stroke so it stays clear at small sizes. Use it for text underline controls, rich text editors, typography settings, and formatting toolbars. It belongs to Iconoir Regular free set in the Iconoir family.

## Preview

![Clean line icon of a U-shaped curve above a horizontal line. Used for text underlining and formatting controls.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/4/underline-ijhnocv5e8be8pllb0d5ac.png/underline-5zplgxi3442g4np0g8wkxa.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Underline
- **Type**: Icon
- **Set**: [Iconoir Regular](/icons/iconoir-regular.md) — Iconoir is a free and open source icon set created by Luca Burgio with clean, consistent design.
- **Family**: [Iconoir](/icons/iconoir.md)
- **Style**: Line, Stroke
- **Category**: All Icons › All Icons
- **Default size**: 16px
- **Stroke width**: 1px
- **Pricing**: Free
- **License**: [MIT](https://github.com/iconoir-icons/iconoir/blob/main/LICENSE)
- **Author**: [Iconoir](https://iconoir.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: underline, u shape, magnet, horseshoe, attraction, physics, poles, field, force, north south, science

## Download

- [Download Underline on Streamline](https://www.streamlinehq.com/icons/download/underline--29591)

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