Warnings, failed validation and the confirm step in front of something destructive. Boxed in a square, in stroke, duotone and fill, free under MIT.
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<path d="M6 3H18C19.65685 3 21 4.34315 21 6V18C21 19.65685 19.65685 21 18 21H6C4.34315 21 3 19.65685 3 18V6C3 4.34315 4.34315 3 6 3Z"/>
<path d="M12 7V13"/>
<path d="M13 17C13 17.55228 12.55228 18 12 18C11.44772 18 11 17.55228 11 17C11 16.44772 11.44772 16 12 16C12.55228 16 13 16.44772 13 17Z" fill="currentColor" stroke="none"/>
</svg>Also called
What someone searching for this drawing would have typed instead. These are the words the browser's search matches on.
- exclamation
- warning
- caution
- attention
- important
- error
Containers
The same drawing boxed differently. Each is its own icon, with its own name.
Related icons
The rest of the alert family first, then the Actions shelf.
FAQ
Answered from square-alert's own facts: its shelf, the weights it was drawn in, its siblings and its dates.
- What is the square-alert icon for?
- Warnings, failed validation and the confirm step in front of something destructive. It is filed under Actions in Keyline Icons, drawn on the same 24×24 grid as the rest of the set. People look for it as exclamation, warning, caution, attention, important and error, and the browser's search matches all of those.
- What styles does the square-alert icon come in?
- All three: stroke, duotone and fill. They are drawn from the same geometry, so swapping weight never moves anything.
- How is square-alert different from alert?
- square-alert is the same drawing inside a square. The bare glyph is alert, and it is also boxed as circle-alert.
- What other icons go with square-alert?
- ban, check, circle-check, circle-minus, circle-more-horizontal and circle-more-vertical, and 12 more, all shown below. They are the Actions shelf: nothing else in the set is named after alert.
- How do I import square-alert in React?
- <SquareAlert /> is the component, and the weight decides the module: stroke from "@keyline-icons/react", duotone from "@keyline-icons/react/duotone" and fill from "@keyline-icons/react/fill". It takes the usual SVG props plus a size, so <SquareAlert size={16} /> and className="size-4" both work, and there is no provider or theme to set up.
- Where is the square-alert SVG?
- icons/stroke/square-alert.svg, icons/duotone/square-alert.svg and icons/fill/square-alert.svg in the repository, normalised: no wrapper, no ids and no classes to strip out. The tabs above hand you the same drawing as SVG or JSX without the download, and neither needs an install.
- When was square-alert added to the set?
- Added 23 Aug 2026. It ships in v0.1.1, so an install at that version or later has it.
Questions about the set rather than about this drawing are answered where they belong. The home page covers what the set is, how the three styles differ, why some icons come boxed and where the Figma file is; installing the set in a shadcn/ui project covers the React package, the CLI and using an icon without React. The MIT licence is stated in the footer of every page.