Icons

Phosphor Function Bold Icon

Use the Function Bold SVG icon from Phosphor in your product UI. IconStash gives you instant access to the SVG code, React JSX snippet, CSS background-mask, and custom PNG download — all from the browser with no login.

Open in editor Browse Phosphor

Interactive Customizer

1.5px
128px

About this icon

Use the Function Bold icon

The Function Bold icon (Phosphor) is categorized under Interface. Its bold style is optimal for interface components and product UI and scales cleanly from 16px to 512px.

Use the IconStash detail panel to preview with a custom background, adjust stroke width, and generate production-ready SVG or PNG files without any external tools.

Export formats

Copy clean SVG vectors with one click, generate custom-size PNG files from 16px to 512px, export JSX/React components ready to paste into your project, or use the icon as a CSS background-mask for flexible theming.

All exports are based on the same editable vector — so the Function Bold icon stays pixel-perfect at 16px, 24px, 48px, and any large marketing size.

Design & UX integration

Aesthetic characteristics

Phosphor draws Function Bold with a uniform stroke weight and generous curves. Its defining feature is a six-weight system — Thin, Light, Regular, Bold, Fill and Duotone — so one concept can carry an entire visual hierarchy without you switching icon families mid-product.

UX best practices

As a general interface glyph, the Function Bold icon does its job best between 16px and 24px, sitting next to a text label. Icon-only treatments work for a small set of universally understood actions, but comprehension falls off quickly once the action is specific to your product — so when in doubt, add the word.

Use in your project

React / npm — Phosphor

npm install phosphor-react

import { FunctionBold } from 'phosphor-react';

// JSX usage:
<FunctionBold size={24} weight="regular" />

Copy the SVG markup directly from the IconStash editor to use the Function Bold icon without any npm package — paste it into HTML, JSX, or a design tool.

Inline SVG (copy & paste)

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 256" width="24" height="24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" role="img" aria-label="function-bold icon"><path fill="currentColor" d="M212 40a12 12 0 0 1-12 12h-29.29A20 20 0 0 0 151 68.42L142.38 116H184a12 12 0 0 1 0 24h-46l-9.44 51.87A44 44 0 0 1 85.29 228H56a12 12 0 0 1 0-24h29.29A20 20 0 0 0 105 187.58l8.62-47.58H72a12 12 0 0 1 0-24h46l9.44-51.87A44 44 0 0 1 170.71 28H200a12 12 0 0 1 12 12"/></svg>

Library & related icons

About Phosphor Icons

Flexible icon family with 9,000+ icons across six weights: Thin, Light, Regular, Bold, Fill, and Duotone. Designed to work together at any scale.

  • Total icons: 9,198+
  • Style: multi-style
  • License: MIT
  • npm package: phosphor-react
Browse all 9,198 Phosphor Icons icons →

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Frequently asked questions

What is the Function Bold icon?

The Function Bold icon is a bold-style SVG icon from the Phosphor library, categorized under Interface. It is designed for use in general-purpose product UIs, design systems, component libraries, web applications, and marketing sites. On IconStash you can preview it, customize its color and size, and export it in SVG, PNG, JSX, or CSS formats directly from your browser.

Is the Function Bold icon free to use?

Yes. Phosphor is licensed under MIT, making it free for personal and commercial use. This means you can freely use the Function Bold icon in personal, commercial, and open-source projects. IconStash provides SVG and PNG access at no cost with no login required.

How do I use the Function Bold icon in React?

Install the package with `npm install phosphor-react`, then import the component into your React file. IconStash's detail panel shows you the exact npm command, import statement, and JSX usage snippet for every icon — just click the Code tab and copy with one click.

What is the Phosphor icon library?

Flexible icon family with 9,000+ icons across six weights: Thin, Light, Regular, Bold, Fill, and Duotone. Designed to work together at any scale. It contains 9,198+ icons. IconStash indexes the complete Phosphor collection alongside 27 other open-source libraries — 134,701 icons total — in a single unified search interface.

Can I download the Function Bold icon as a PNG?

Yes. Open the Function Bold icon in IconStash, set your desired pixel size (16px to 512px) in the detail panel, and click Download PNG. You can also export a multi-resolution ZIP pack containing 16, 24, 32, 48, 64, 128, 256, and 512px PNGs with a single click.

What does the bold icon style mean?

An icon in bold style uses a clean SVG vector format. This style is best suited for interface components. The Phosphor Function Bold icon follows this visual convention throughout the Phosphor design system.

Can I change the Function Bold icon's color and size before downloading?

Yes. In IconStash's editor panel, choose from six color presets (blue, slate, green, purple, red, teal) or enter a custom hex value. Drag the size slider (16–256px) or type an exact pixel value up to 512px. Changes apply instantly to the SVG preview, the PNG output, and the copied code.