Heading 3

The heading-3 icon represents tertiary headings, subsection titles, and detailed content organization in content management and document structuring applications. Featuring H with the number 3, this symbol has become the universal indicator for H3 formatting, subsection organization, and tertiary content structure in content editors and documentation systems.

In modern applications like content management platforms or detailed documentation tools such as technical writing software and blog organization systems, users encounter this icon when creating detailed subsections and organizing granular content structure. Popular platforms including documentation systems like Notion and content organization tools display this symbol to represent H3 formatting, detailed subsection creation, and tertiary content hierarchy features.

From a detailed content perspective, the heading-3 symbol communicates more than just "smaller heading" - it specifically indicates granular content organization, detailed subsection management, and structured information depth for comprehensive content navigation and detailed reader guidance. This distinction helps content organizers understand they're creating detailed content structure rather than primary sections or secondary organization levels.

Heading 3 is one of 1,655 icons in Lucide, made by Lucide Contributors and released under ISC. It is drawn on a 24 × 24 grid with a 2 stroke.

Sign in (it's free), then open Get icon, Install with shadcn CLI, and pick your package manager to copy the command. It adds Heading3Icon to components/icons/lucide-heading-3.tsx: one file, a size prop (24 by default) and every SVG prop, with no icon package.

Copy it as React (from Get icon, or the Code section): a typed Heading3Icon component you paste into your project, with no package to install. Only the icons you import reach your bundle. It works in Next.js and any React app.

Yes, if your project has lucide-react: Heading 3 is `Heading3Icon` there, used as <Heading3Icon />. The shadcn.io MCP server answers with that import when it finds the package. Without it, copy the icon from here.

Open Get icon, then Copy as code, and pick Vue, Svelte, Angular, Solid or Preact; the Code section shows each one too. Every version is one self-contained component with the SVG inside, and SVG and data URL copies are there for plain HTML and CSS.

With Pro, the shadcn.io MCP server lets Claude Code, Cursor or any MCP client find the Heading 3 icon, or any of 1,655 Lucide icons, and install it from a prompt.

It's drawn in currentColor, so it takes the text color wherever you use it: a class like text-primary recolors it. To bake a color in, set one in Customize before you copy.

Set width and height on the component, or a class like size-6. It's drawn on a 24 × 24 grid, so it stays sharp at any size. Customize also sets the size it exports at, its padding and rotation, and its stroke.

Heading 3 is a line icon drawn with a stroke width of 2. Change it in Customize before you copy, or pass strokeWidth to the installed component when all of its strokes share one width.

Yes. It follows the text color, so with text-foreground (or any theme token) it changes with your light and dark themes. The icon is a vector, so it needs no separate dark asset.

Next to a visible label it's decoration: add aria-hidden="true" so screen readers skip it. Standing alone, as in an icon button, give the button a name instead, like aria-label="Heading 3", so screen readers say what it does.

Yes. Heading3Icon passes every SVG prop to the svg element, so <Heading3Icon aria-hidden="true" /> works, and so do role="img" with aria-label, or a title child, when it carries meaning on its own.

Yes. Open Get icon, then Download file: SVG for code or design tools like Figma; PNG, WebP or JPEG at 512px; or an ICO favicon with 16, 32 and 48px inside. Each one uses what you set in Customize.

Yes. ISC allows commercial use; keep the license notice when you ship the icons' source files. The full terms are in the license, linked on this page.

No visible credit is required: ISC only asks that you keep the license notice if you ship the icons' source files. Icons installed with the shadcn CLI already start with a comment naming Lucide, Lucide Contributors and the license.

Yes. Copying and downloading it is free, and the shadcn CLI install only needs a free account.

1 other library draws an icon called Heading 3. The Other libraries section on this page shows each one, so you can compare them and open the one that fits your style.

Its tags are organization, content and detail. Each tag page lists the icons that carry it from every library, which is the quickest way to find a match for Heading 3 in another set.