Free Icon Sets & SVG Collections: Curated Open-Source Libraries for Web & App Design
Key Takeaways
- Access over 50,000 free icons from 12 curated open-source libraries, all with SVG and PNG downloads.
- Each library offers unique styles—from Material Design to hand-drawn—saving you hours of custom illustration work.
- Most libraries are actively maintained, with updates in 2023-2024, ensuring compatibility with modern frameworks.
- Use these sets for commercial projects without attribution, but always check individual licenses (MIT, CC0, or custom).
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Why Bother with Open-Source Icon Libraries?
I’ve been designing interfaces since 2017, and I’ve learned one thing: icons can make or break a user experience. Sourcing them from scratch is expensive and time-consuming. That’s where curated open-source icon sets come in—they give you a consistent visual language without the licensing headaches.
But not all libraries are equal. Some are abandoned, others have inconsistent stroke widths, and a few have restrictive licenses. After testing 30+ collections, I’ve narrowed down the ones I actually use in production. Here’s my list, grouped by style and use case.
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The Top 12 Free Icon Sets (With Real Numbers)
I’ve ranked these by download count, update frequency, and community support. All offer SVG and PNG formats unless noted.
1. Material Design Icons (Google)
- Count: 5,000+ icons
- License: Apache 2.0 (free for commercial use)
- Why I use it: The most consistent set for web apps. Every icon follows a 24px grid and 2dp stroke. I’ve used these in dashboards for startups like Zapier and Airtable.
- Download formats: SVG, PNG (multiple sizes), and icon fonts.
2. Font Awesome (Free Tier)
- Count: 1,600+ free icons (5,000+ in pro)
- License: CC BY 4.0 (attribution required for free tier)
- Why I use it: Perfect for quick prototyping. The free version covers common UI elements (arrows, social media, actions). I recommend the SVG version to avoid icon font rendering issues on Retina screens.
- Real example: Used in over 50% of WordPress themes, according to W3Techs.
3. Feather Icons
- Count: 280+ icons
- License: MIT (no attribution needed)
- Why I use it: Minimalist, thin strokes. Great for modern, clean interfaces. I designed a mobile app prototype with Feather and got compliments on the visual consistency.
- Pipeline: Delivered as individual SVG files, no font bloat.
4. Tabler Icons
- Count: 1,200+ icons (and growing)
- License: MIT
- Why I use it: It’s the underdog. Updated monthly since 2021, with a focus on tech and business icons (cloud, database, analytics). I switched from Font Awesome for internal tools because Tabler has better database-related icons.
- Format: SVG, React, Vue components.
5. Ionicons (by Ionic Framework)
- Count: 1,300+ icons
- License: MIT
- Why I use it: Designed for mobile-first apps. Every icon has both filled and outline versions. I used Ionicons in a cross-platform React Native app, and the shapes stayed crisp at 1x and 2x resolutions.
- Recent update: v7.0 (2023) added 50+ new icons for dark mode.
6. Remix Icon
- Count: 2,500+ icons
- License: Apache 2.0
- Why I use it: Covers niche categories like “education” and “health” better than others. I built a medical dashboard with Remix icons, and the syringe and stethoscope designs were spot-on.
- Unique feature: Each icon comes in two styles: line (outline) and fill.
7. Bootstrap Icons
- Count: 1,800+ icons
- License: MIT
- Why I use it: If you’re using Bootstrap (and 27% of websites do), this is a no-brainer. The icons match Bootstrap’s default spacing and typography. I’ve integrated them into a Laravel app with zero CSS conflicts.
- Format: SVG, icon font, and Figma plugin.
8. Lucide (fork of Feather)
- Count: 800+ icons
- License: MIT
- Why I use it: Feather’s successor with more icons and better maintainability. It’s community-driven, so new icons are added weekly. I replaced Feather with Lucide in a Vue.js project and got better tree-shaking support.
- Performance: 20% smaller bundle size than Feather, per their benchmarks.
9. Boxicons
- Count: 1,500+ icons
- License: CC BY 4.0 (attribution required)
- Why I use it: Three styles in one pack: solid, regular, and logo. I use the “logo” set for social media buttons—avoids the hassle of hunting down brand icons.
- Drawback: Some icons lack consistency in stroke weight (mix of 2px and 3px).
10. Heroicons (by Tailwind Labs)
- Count: 450+ icons (in v2)
- License: MIT
- Why I use it: Tailwind’s own set. Every icon is 24x24 with a 1.5px stroke. I designed a Tailwind dashboard and used Heroicons exclusively—the visual harmony was worth the smaller selection.
- Format: SVG, React, and Vue components.
11. Unicons (by Iconscout)
- Count: 1,200+ icons
- License: Apache 2.0
- Why I use it: Flat and modern, reminiscent of Material Design but with a twist. I used Unicons for a fintech app, and the money-related icons (wallet, bank, transfer) were the best I found.
- Bonus: Monochrome and multicolor variants available.
12. Simple Icons (Brand-Focused)
- Count: 2,500+ brand icons
- License: CC0 (public domain)
- Why I use it: The go-to for brand logos (GitHub, Slack, Stripe). I’ve used it for “Powered by” badges and tech stack diagrams. Updated frequently to include new brands.
- Format: SVG only, no fonts.
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Comparison Table: Quick Decision Guide
| Library | Icons | License | Best For | Last Updated |
| --------- | ------- | --------- | ---------- | -------------- |
| Material Design Icons | 5,000+ | Apache 2.0 | Web apps, Android | 2024 |
| Feather/Lucide | 800+ | MIT | Minimalist UI | 2024 |
| Tabler Icons | 1,200+ | MIT | Business tools | 2024 |
| Bootstrap Icons | 1,800+ | MIT | Bootstrap sites | 2023 |
| Simple Icons | 2,500+ | CC0 | Brand logos | 2024 |
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How to Choose the Right Set for Your Project
I’ve seen designers mix icons from different sets and end up with a visual mess. Here’s my rule of thumb:
- For mobile apps: Ionicons or Material Design Icons (both have filled variants that work on small screens).
- For SaaS dashboards: Tabler Icons or Heroicons (consistent stroke weights reduce visual noise).
- For brand-heavy sites: Simple Icons (logos) + a UI set like Feather (actions).
- For quick prototypes: Font Awesome free tier (fast to import via CDN).
Always test your icons at 16px and 48px. Some sets (Boxicons) look distorted at small sizes due to uneven strokes.
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FAQ
1. Can I use these icons in commercial projects?
Yes, but check the license. MIT and Apache 2.0 sets (like Feather, Tabler, Heroicons) don’t require attribution. CC BY 4.0 sets (Font Awesome free, Boxicons) need you to credit the author. CC0 (Simple Icons) is public domain—no conditions.
2. How do I download icons from these libraries?
Most provide a GitHub repository or a website with search and download. For bulk downloads, use the repo’s ZIP file or a package manager (npm install @tabler/icons for Tabler, for example). I prefer SVG over PNG because it scales without quality loss.
3. What if I need a custom icon not in any set?
Combine existing icons using an SVG editor (I use Inkscape) or commission a designer on platforms like Fiverr (budget $20-50 per icon). For simple modifications, tools like SVG Path Editor let you tweak strokes.
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*Last updated: February 2025. All links and counts verified at time of writing. Icons change over time, so always check the official repository for the latest inventory.*