---
title: "Warning Thin Icon | Free Download PNG & SVG | Phosphor Thin"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/warning-thin--28926
canonical_url: "https://www.streamlinehq.com/icons/download/warning-thin--28926"
summary: "Clean line icon of an outlined warning triangle with an exclamation mark. Used for alerts, errors, and caution messages."
---

# Warning Thin icon

The Warning Thin icon shows an outlined triangle with rounded corners, a vertical exclamation mark, and a dot. Drawn in the line style on a 16px grid, its simple geometry stays clear in compact interfaces. Use it for alerts, error states, validation messages, caution banners, and safety notices. It belongs to Phosphor Thin free set in the Phosphor family.

## Preview

![Clean line icon of an outlined warning triangle with an exclamation mark. Used for alerts, errors, and caution messages.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/phosphor-thin/warning-thin-9b2e4.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Warning Thin
- **Type**: Icon
- **Set**: [Phosphor Thin](/icons/phosphor-thin.md) — Phosphor is a free and open source icon set created by Helena Zhang and Tobias Fried.
- **Family**: [Phosphor](/icons/phosphor.md)
- **Style**: Line, Outlined, Minimal
- **Category**: All Icons › Vector Icons
- **Default size**: 16px
- **Pricing**: Free
- **License**: [MIT](https://raw.githubusercontent.com/phosphor-icons/homepage/master/LICENSE)
- **Author**: [Phosphor](https://phosphoricons.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: Warning, Caution, Danger, Alert, Hazard, Attention, Notice, Exclamation, Triangle

## Download

- [Download Warning Thin on Streamline](https://www.streamlinehq.com/icons/download/warning-thin--28926)

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