20 Best Free Icon Sets for Websites and Apps

Icons help people recognise familiar actions without adding more words to every button and menu. This guide is for designers, developers, students, and small teams looking for usable free collections rather than a pile of unrelated downloads.

The picks include lightweight outline families, expressive sets with multiple weights, platform-oriented symbols, and logos. Check each project's current licence and package instructions before using icons in commercial work.

Quick picks

• Best overall: Lucide — a consistent, friendly outline set with broad framework support.
• Best for variable styles: Phosphor — six weights make it easy to set a visual hierarchy.
• Best for Material interfaces: Material Symbols — Google's variable icon font offers adjustable fill and weight.
• Best for brand marks: Simple Icons — extensive logos for products and services.

How we picked

We chose established libraries that are free to access and useful in real interface work, prioritising clear styles, dependable distribution, and recognisable documentation. A good fit depends on more than the number of glyphs:

• Consistency: do stroke, corner, and optical-size choices feel related?
• Workflow: can you use SVGs, a font, or a package that fits your stack?
• Coverage: are the actions and objects your project needs represented?
• Licence: confirm the terms for your intended use, especially brand marks.

Clean interface essentials

1. Lucide

Lucide is a community-led continuation of Feather, keeping its familiar thin, rounded outline style while adding a large catalogue. Its official packages cover React, Vue, Svelte, and more, and each icon can be customised as an SVG component. The restraint makes a product interface feel coherent, though the line-only look may not suit a bold or filled visual identity. It is open source, with community contributions.

Best for: product teams wanting approachable outline icons across several frameworks.

2. Heroicons

Tailwind Labs' Heroicons pairs naturally with Tailwind CSS and provides outline and solid versions, plus mini and micro sizes for compact controls. Its React and Vue packages make implementation straightforward, while the deliberately focused range keeps choices manageable. It is less comprehensive than encyclopedic libraries, so unusual concepts may need another source. Heroicons is free and open source.

Best for: Tailwind projects that need polished, familiar interface symbols.

3. Tabler Icons

Tabler Icons offers a substantial set of outline SVGs with a consistent stroke and simple customisation options for size, colour, and stroke width. Developers can install framework packages, including React, rather than manually copying every file. The broad range is useful for dashboards, but the thin-line treatment can disappear at very small sizes unless tested carefully. The project is open source.

Best for: dashboards and admin tools with many navigation and action needs.

4. Feather

Feather is the compact, minimalist outline family whose visual language inspired Lucide. Its uncomplicated SVG files are easy to edit and work well in prototypes or lightweight sites. The limited catalogue and lack of built-in filled alternatives are real constraints; projects needing many specialised symbols may outgrow it. Feather is free and open source.

Best for: simple landing pages and small interfaces favouring minimal line art.

5. Remix Icon

Remix Icon supplies a large, carefully aligned collection in both line and filled styles, so a selected symbol can change emphasis without changing its basic shape. Official web font, SVG, and framework options suit different build setups. Its breadth helps, though abundant choices can slow teams without selection rules. It is free and open source.

Best for: sites that need both outlined and filled versions of common actions.

6. Iconoir

Iconoir takes a clean geometric approach and provides SVG icons alongside packages for React and other popular frameworks. Its catalogue covers everyday interface elements as well as more distinctive concepts, and stroke customisation helps match a brand. The visual language remains mostly outline-based, making it a weaker choice if a project depends on colourful pictograms. Iconoir is open source.

Best for: designers seeking modern outline symbols beyond the most common basics.

7. Radix Icons

Radix Icons is a compact set designed to work with Radix's accessible UI primitives and includes a React package. The icons share a restrained, pixel-conscious style that looks at home in menus, forms, and developer tools. Its intentionally small selection means it will not cover every content category, and the spare aesthetic is not for every brand. It is free and open source.

Best for: React interfaces built with Radix UI components.

Flexible weights and everyday breadth

8. Phosphor

Phosphor stands out with six weights—thin, light, regular, bold, fill, and duotone—across a broad family. React, Vue, and other packages let teams tune the same symbol to different roles without mixing icon styles. That range is powerful but can tempt designers to use too many weights at once; define a small system first. Phosphor is open source.

Best for: brands that want a single icon family to support subtle and emphatic moments.

9. Material Symbols

Google's Material Symbols is a variable icon font with controls for weight, fill, grade, and optical size, alongside downloadable assets. Its breadth suits Android and web interfaces that follow Material conventions, and variable settings provide fine visual adjustment. A font-based workflow requires attention to loading and rendering, while its distinctive shapes may feel out of place in a bespoke system. It is free.

Best for: Material-style products needing adjustable symbol weight and fill.

10. Bootstrap Icons

Bootstrap Icons is an independent icon library from the Bootstrap team, not a requirement to use the Bootstrap CSS framework. It offers SVGs, an icon font, and packages for tools such as React, with familiar symbols for forms and navigation. Some icons naturally echo Bootstrap's visual character, so they may not match every design system. The collection is free and open source.

Best for: Bootstrap users and web projects needing an easy SVG or font option.

11. Font Awesome Free

Font Awesome remains widely recognised, and its Free offering includes useful solid, regular, and brand icons, distributed through web fonts and packages such as React. Its familiar shapes can make common actions instantly legible. The free selection is smaller than the full paid catalogue, and mixing free and Pro assets can complicate a team's handoff. Free icons are available under the project's stated terms.

Best for: existing sites and teams already comfortable with Font Awesome conventions.

12. Ionicons

Ionicons was designed for Ionic apps but works on the web through custom elements and framework integrations. Many icons have outline, filled, and sharp variants, giving mobile interfaces useful state changes. It leans toward app navigation and common mobile actions, so specialised business or editorial imagery can be sparse. Ionicons is free and open source.

Best for: mobile-first projects using Ionic or familiar platform-like controls.

13. Boxicons

Boxicons includes regular outline, solid, and logo categories, distributed as web fonts and framework packages including React. Its straightforward shapes are easy to place in cards, buttons, and social links without a complex setup. The three-style structure offers less fine-grained flexibility than variable-weight libraries, and the visual personality is fairly conventional. Boxicons is free and open source.

Best for: small business websites looking for practical general-purpose coverage.

14. MingCute

MingCute combines line and filled styles with a clean, rounded sensibility, including a React package and downloadable SVG files. The matched styles make it convenient to show active and inactive interface states without changing families. It is less universally familiar than Material or Font Awesome, so review its shapes against your brand before adopting it. MingCute is free and open source.

Best for: contemporary apps that need coordinated line and solid states.

Brand, platform, and specialist collections

15. Simple Icons

Simple Icons focuses on logos for companies, products, and services rather than general interface controls. SVGs and developer packages make brand marks easy to retrieve, while the catalogue's breadth is useful for technology directories and integrations pages. Trademark use and logo guidelines still matter, and its focused purpose means it cannot replace an interface icon family. The project is open source; check its guidance for brand-specific terms.

Best for: directories, technology stacks, and pages naming third-party services.

16. Octicons

GitHub's Octicons is the icon system used across GitHub and its Primer design system. It has SVG assets and a React package, with clear conventions for interface elements such as repositories, issues, and pull requests. That developer-focused vocabulary is a strength in code tools but less suited to consumer shopping or lifestyle apps. Octicons is free and open source.

Best for: developer products and interfaces that echo GitHub's familiar patterns.

17. Fluent UI System Icons

Microsoft's Fluent UI System Icons is a cross-platform family with regular and filled variants in several sizes. Official packages serve Fluent UI and other development environments, making it useful for Windows-oriented products and Microsoft integrations. Its system-specific look may feel conspicuous beside a different visual language, and the many variants call for deliberate choices. The project is open source.

Best for: Microsoft-focused apps and teams aligning with Fluent design.

18. Carbon Icons

IBM's Carbon Icons belongs to a broader enterprise design system and includes interface-focused symbols in consistent sizes. Carbon's React package and documentation are particularly helpful when icons sit beside its components and accessibility patterns. The industrial, functional style is not a natural fit for every consumer brand, and the most useful experience comes from adopting more of Carbon. The project is open source.

Best for: enterprise software and products already using IBM Carbon.

19. css.gg

css.gg presents a compact, distinctive icon family designed around CSS-friendly implementation, with source options for web projects. Its geometric forms can add a recognisable edge to minimal sites, and the range includes common interface concepts. It is not as extensive or universally integrated as larger SVG collections, so confirm coverage and rendering needs before standardising on it. It is free to use; review current project terms.

Best for: lightweight web interfaces seeking a sharp, geometric visual style.

20. Iconify

Iconify is an open-source framework and search tool that brings many icon collections into one workflow, rather than one uniform hand-drawn family. Its Iconify for React and Vue integrations can load icons by collection and name, which is convenient when a project needs niche symbols. Quality, style, and licence differ between included sets, so avoid mixing them casually and inspect each source. Iconify itself is free and open source.

Best for: developers needing broad search and access to specialist icon collections.

How to choose the right one

Match icon style to your interface: outlines suit quiet layouts, while solid symbols add emphasis. Pick one family, check its coverage, and test small icons at display size. For SVG assets, tidy files with our SVG minifier before shipping; browse more options in Stockio's icon directory and illustration directory. If you are assembling a wider design toolkit, see the resources collection.

Key takeaways

• Choose consistency over sheer quantity: one coherent family usually looks more professional than a collage.
• Match the package to your workflow: SVG, font, and framework components have different trade-offs.
• Use variants deliberately: filled and outline versions can distinguish states when applied consistently.
• Treat logos differently: brand marks have usage rules that general interface symbols do not.
• Check licences and display sizes before relying on a set in a shipped project.