What Iconify is
Iconify gathers over 200,000 icons from about 200 open-source icon sets (Material Design, Tabler, Phosphor, Lucide, Font Awesome Free, Remix and many more) behind one keyless API.
Best for
Interface and feature icons, logos-style symbols and pictograms, as clean SVGs that recolour with CSS.
Licence and what it means for you
Set per icon set: mostly MIT, Apache 2.0, ISC or the SIL Open Font License (commercial use allowed; keep the licence notice), and a few CC BY sets (credit needed). Each icon shows its set's licence.
How Image Asset Server searches it
Through the public Iconify API (api.iconify.design). Icons are SVGs served by Iconify: thumbnails, previews and downloads are the same vector file.