Warning Icon Generator

What the warning icon means

A warning that needs attention but is not necessarily an error. The triangle is the ISO-standard hazard shape.

Status icons exist to be scanned, not read, and they follow a strict shape grammar: triangles warn, circles inform, octagons stop. Deviating from that grammar slows recognition measurably. Because they will be rendered small and often in colour-coded pairs, the most robust construction is a solid-filled outer shape with the interior mark knocked out in the background colour — an outlined triangle with a thin exclamation mark inside it fails at exactly the size where a status icon matters most.

Where you will actually see it

• form validation warnings
• destructive action confirmations
• incident and alerting dashboards

Drawing the warning at 16 pixels

The exclamation mark inside the triangle has very little room. Solid-fill the triangle and knock the mark out in the background colour.

Stroke weight is the control that matters most here. Lucide icons are drawn on a 24 × 24 grid with a 2px stroke, which means that when the icon is scaled down to 16px the stroke is effectively 1.33px — below one device pixel on a standard-density display. Raising the stroke to 2.5 or 3 before exporting keeps the shape solid; lowering it to 1.5 suits large app icons where a heavy stroke looks clumsy. The editor exposes this as a slider, so you can find the value that survives your smallest target size rather than guessing.

Using it in code

If you want the icon in a Vue project rather than as a downloaded asset, it is a named export of the lucide package:

import { TriangleAlert } from 'lucide-vue-next'

<TriangleAlert :size="24" :stroke-width="2" />

The download button above gives you something different: the icon composed onto a background with a corner radius, exported as a flat SVG path set. The exporter converts the icon out of its <foreignObject> wrapper first, because a foreign object taints an HTML canvas and would otherwise break PNG and ICO rasterisation.

Related icons

Other icons in the status group.