---
title: "Warning Square Icon | Free Download PNG & SVG | Iconoir Regular"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/warning-square--29591
canonical_url: "https://www.streamlinehq.com/icons/download/warning-square--29591"
summary: "Clean line icon of a rounded square containing an exclamation mark. Used for warnings, alerts, errors, and validation messages."
---

# Warning Square icon

The Warning Square icon shows a rounded square outline containing a centered exclamation mark. Drawn in the line style on a 16px grid with a 1px stroke so it stays clear at small sizes. Use it for warning states, alerts, error messages, validation feedback, and notification panels. It belongs to Iconoir Regular free set in the Iconoir family.

## Preview

![Clean line icon of a rounded square containing an exclamation mark. Used for warnings, alerts, errors, and validation messages.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/4/warning-square-yy31pdgqcgibk3c1i9lwgf.png/warning-square-e4r782ce82tqxmd13g3fe.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Warning Square
- **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**: warning, square, exclamation, alert, danger, caution, attention, important, notice, mark, point

## Download

- [Download Warning Square on Streamline](https://www.streamlinehq.com/icons/download/warning-square--29591)

## Also available in other styles

- [Warning Square — Iconoir Solid](/icons/download/warning-square--29590.md) (Free)

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