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footprints.buildwithtrace.com is a catalog, distribution hub, and community platform for EDA PCB footprints — ~24,690 footprints across ~214 libraries: 15,428 from buildwithtrace/trace-kicad-footprints-lib plus 9,262 from CERN. It is a thin client: browsing is served from a committed JSON index, and generation/persistence is proxied to the Trace backend. Footprint-only — there is no symbol code here.

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Routes

RouteTypePurpose
/ServerHero, search, stats, Browse by Library, popular footprints
/browseClientSearch + paginated grid over all footprints
/browse/[library]ServerAll footprints in one library
/footprint/[id]ServerDetail: pad layout, pad table, copy/download
/generateClientAI footprint generator (auth)
/contributeServerUpload + submit a .kicad_mod
/communityClientCommunity-shared generated footprints
/my-footprintsClientA user’s saved footprints (auth)
/login, /auth/callback—Shared Trace auth

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Data model

interface Footprint {
  id: string;
  name: string;
  library: string;                 // the .pretty library
  description: string;
  tags: string;
  padCount: number;
  pads: Array<{ number: string; type: string }>;   // type: "smd" | "thru_hole" | …
  model3d?: string | null;
  source?: "trace" | "cern";
}
Footprints have no categories. They are organized by library (the .pretty lib) and free-text tags. The home page and /browse/[library] group by library, and the homepage “Browse by Library” grid uses the top libraries by count.

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Sources

Both Trace and CERN footprints are merged into one index. Each footprint records its source (trace | cern); on id collisions, Trace wins de-dupe. Raw downloads are only available for Trace footprints (CERN falls back to clipboard reconstruction) — see Clipboard & Download.

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Where to go next

Browse & Search

Generate

Contribute

Clipboard & Download

Saved & Community

API Reference

Data Layer