The 14 Best Icon Libraries for UI Design in 2026

Last updated: August 2026

Choosing an icon library is a decision you make once and live with for years. Swap libraries mid-project and you'll spend a week fixing optical alignment on four hundred icons, so it's worth ten minutes of thought up front.

Fourteen libraries below, with the licensing situation stated plainly, because that's the part that causes actual problems later.

The open-source defaults

Lucide is the one I'd pick without a specific reason to pick otherwise. It's a community-maintained fork of Feather that kept the original's restraint while growing to well over a thousand icons. MIT licensed, consistent 24×24 grid, stroke-based, and it ships as packages for React, Vue, Svelte, Flutter and plain SVG.

The consistency is the real value. Icons drawn to the same grid, weight and corner radius sit together correctly without manual optical adjustment.

Heroicons comes from the Tailwind team, in outline, solid and mini variants. Smaller than Lucide, and that's deliberate — it covers common UI needs and stops. If your stack is Tailwind, the visual language already matches everything else you're using.

Tabler Icons is the volume play: over five thousand icons, MIT licensed, on a consistent stroke grid. When you need something obscure and don't want to draw it, Tabler usually has it.

Feather is the original minimal stroke set that influenced most of this list. Maintenance has slowed, which is why most projects now start on Lucide instead, but the design language remains excellent.

Iconoir is a large, genuinely free, MIT-licensed set with no paid tier and no attribution requirement. Slightly more character than Lucide or Heroicons if the flatter sets feel too neutral for your brand.

Remix Icon offers both outline and filled versions of every icon, which matters for navigation patterns where the active state is a filled variant. Apache 2.0.

Supercons is a small, friendly open-source React set, and

Unicorn Icons brings a more playful, modern style for products that shouldn't look corporate.

The big commercial libraries

The Noun Project has millions of icons covering subjects no UI library will ever include. Free with attribution, or paid to drop it. The trade is consistency — icons come from thousands of different creators, so a set assembled from it will not sit together cleanly without work.

Font Awesome is the long-standing default in a lot of codebases. The free tier is genuinely usable; the larger set and the newer styles are paid. Heavier than the modern SVG sets if you're loading it as a font.

Streamline is one of the largest professionally-drawn collections available, spanning many distinct styles with real internal consistency. Paid, and priced accordingly. Worth it when icons carry a lot of the product's personality.

Icons8 and

Flaticon both offer enormous libraries across many styles with free tiers that require attribution. Useful for marketing and illustration work; less suited to a consistent product UI.

IconBuddy searches across many open-source libraries at once, which is the fastest way to find one specific icon without committing to a library.

Picking one

Match stroke weight to your type. A 1.5px stroke icon next to a 600-weight heading looks thin. This is the single most common mismatch.

Pick one library and stay in it. Mixing sets is the fastest way to make a polished product look assembled. If you need an icon your library lacks, draw it in the same style rather than importing one from elsewhere.

Check the filled variant exists before committing, if your navigation uses filled icons for active states. Not every library provides one.

Read the licence once, properly. MIT and Apache 2.0 mean you can ship without thinking about it. Everything else has conditions.

We catalogue 88 icon libraries in total, including animated sets, illustration libraries and icon editors.