What is the hash icon used for?

It's used to represent hashtags, tags, or numerical identifiers in UI elements.

How do I use the hash icon in React?

Import it as 'Hash' from '@phosphor-icons/react' and use it as a component: ` `.

The Phosphor icon library, including the hash icon, is available under the MIT license.

Phosphor · hash · MIT

The Phosphor hash icon depicts the '#' symbol, commonly used in user interfaces to represent tags, topics, or numerical identifiers.

Install

npm i @phosphor-icons/react

Import & render

import { Hash } from '@phosphor-icons/react';

<Hash size={24} />

Phosphor ships this icon in 6 styles — each its own import:

regular

<Hash size={24} />

thin

<Hash size={24} weight="thin" />

light

<Hash size={24} weight="light" />

bold

<Hash size={24} weight="bold" />

fill

<Hash size={24} weight="fill" />

duotone

<Hash size={24} weight="duotone" />

Library: Phosphor (1,512 icons)
License: MIT
viewBox: 0 0 256 256
Category: communications
Keywords: hashtagoctothorpepound signnumber signtic-tac-toesymbolcommunicationshash

What is the hash icon used for?: It's used to represent hashtags, tags, or numerical identifiers in UI elements.
How do I use the hash icon in React?: Import it as 'Hash' from '@phosphor-icons/react' and use it as a component: `<Hash />`.
What is the license for the Phosphor hash icon?: The Phosphor icon library, including the hash icon, is available under the MIT license.

The same idea in other libraries, and near matches in Phosphor.