Source icons that fit

Reuse the project's icon family for ordinary UI glyphs. Choose a different source when the mark represents a brand, country or file type, then check it in context.

Where to look

These are search starting points, not guaranteed coverage or blanket licences. Check the selected set's licence in its own repository, not only in Iconify's metadata, and check the brand's usage requirements. Do not invent a logo for a real organization when an official asset is unavailable.

Iconify

Search at Iconify's catalog or through its search API. Results use prefix:name identifiers; prefixes limits a query to selected sets. Fetch individual SVGs through https://api.iconify.design/{prefix}/{name}.svg (the identifier remains prefix:name). The public API needs no key; https://api.iconify.design/collections?prefixes=<sets> returns metadata and licences for comma-separated sets.

The public API rate-limits bursts of requests, so for more than a handful of icons fetch per set, not per icon: https://api.iconify.design/<prefix>.json?icons=a,b returns the named icons' SVG bodies in one response, and https://cdn.jsdelivr.net/npm/@iconify-json/<prefix>/icons.json is the whole set from another host. A body is the inside of the element: wrap it in <svg xmlns="http://www.w3.org/2000/svg" viewBox="{left} {top} {width} {height}">, each value from the icon when it has one, else from the set, else 0, 0, 16, 16.

The SVG flag sets circle-flags, flagpack and flag use lowercase ISO 3166-1 alpha-2 codes. A country-name search can return only emoji sets, so build the id directly: circle-flags:fi, flagpack:fi; flag needs a ratio suffix (flag:fi-4x3, flag:fi-1x1), and bare flag:fi is a 404. Use SVG flags rather than emoji: Windows' emoji font has no flag glyphs and shows the letters (FI). For a language selector, language names usually communicate the choice better than national flags.

Use local SVGs or build-time icon data by default. A string identifier passed to @iconify/react can load missing data from the public API at runtime; merely installing an icon-data package does not make that rendering offline. Pass or register the data explicitly. See React usage for the project's chosen integration.

svgl

Use svgl's API docs to find exact titles, categories and asset routes. The API base is https://api.svgl.app (no key). Its docs state a request limit and ask callers to cache: the bare base returns the whole catalogue in one response, which serves many lookups better than one search per logo. It primarily holds software and brand marks, with some file marks such as PDF; use Iconify for flag families and consistent file-type sets. ?search= matches titles; a missing title returns "SVG not found". Browse categories through /categories and use each name exactly as listed there (/category/AI; ai is not found). Registry names are currently slugified titles, not asset filenames (Hugging Face → hugging-face, Next.js → nextjs, shadcn/ui → shadcnui); confirm with https://svgl.app/r/<name>.json before adding. Entries may carry light/dark routes and a separate wordmark.

For a shadcn project, its registry guide defines the @svgl namespace at https://svgl.app/r/{name}.json. Follow the project's package manager and existing registry configuration. If shadcn is absent, use the raw asset rather than initializing a component system just to add a logo.

Without network

Iconify and svgl are online services. Offline, search the installed icon library (for example node_modules/lucide-react/dist/esm/icons/) or any installed @iconify-json/<prefix>/icons.json, and reuse assets already in the repo. For a missing brand mark, ask for the official file or use a neutral placeholder; do not draw one.

Integration gotchas

• Match stroke/fill, optical size and alignment to surrounding UI. Lucide uses a 24 px grid and 2 px stroke; Tabler and Hugeicons sit close, Material and Carbon read thinner. Colour file-type marks carry their own padding and often need one size step up. Mix by role when needed: one family for controls, one set for flags, one for file types. Preserve brand colours where appropriate rather than tinting every mark.
• Choose the variant for its actual background. Check dark and light surfaces if both are supported.
• Inline SVG masks, gradients and clip paths need IDs unique per rendered instance, with every reference updated. A brand-name suffix still collides when the same logo appears twice.
• Put an accessible name on icon-only controls; hide decorative SVGs next to equivalent text. Verify the rendered control and downloaded asset.