Icons are everywhere in a modern interface, so the library you pick is a decision you live with for a long time. Switching later means touching markup across your whole app. It pays to choose well the first time.
Here is a practical checklist for evaluating any icon library.
1. Licensing and cost
Read the license before you commit. Is it free for commercial use? Is there a per-seat fee as your team grows? Do you owe attribution? A library that is cheap for a solo developer can get expensive for a team, so model the real cost at your expected size.
2. Coverage and consistency
Count the icons you actually need, not the headline total. More important than raw quantity is consistency: do all the icons share the same grid, stroke, and visual style? A mismatched set makes your UI look stitched together.
3. Themes and weights
Good libraries offer multiple weights (solid, regular, light, thin) and sometimes themes like duotone. Weights let you set visual hierarchy; a heavier icon draws more attention than a light one. If your design system needs that range, make sure the library has it.
4. Delivery options
How will you ship the icons?
- CDN embed is the fastest to set up and easy to cache.
- Self-hosting gives you full control and removes an external dependency.
- A REST API lets you pull icons programmatically for pickers and tooling.
The best libraries support more than one so you are not boxed in.
5. Developer experience
How much friction is there to add one icon? The ideal is a single class name, no build step, and styling through plain CSS. The more steps between you and a rendered icon, the more it will slow your team down.
Where Iconfyra fits
We built Iconfyra against this exact checklist: 4,510+ icons in Classic and Duotone themes, four weights, CDN embed, self-hosting, and a REST API, with a free plan and no per-seat lock-in. Add a stylesheet, write a class, done.
Whatever you choose, choose deliberately. Your future self will thank you.
