# ThatOpen/engine_web-ifc

Reading and writing IFC files with Javascript, at native speeds.

Repository: https://github.com/ThatOpen/engine_web-ifc
Canonical: https://ross.abutalabs.com/products/engine_web-ifc
Homepage: https://thatopen.github.io/engine_web-ifc/demo
Language: TypeScript
License: MPL-2.0
License Family: copyleft
Topics: wasm, ifc, cpp, emscripten, webassembly, javascript
Last push: 2026-08-31T01:09:43+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 73, longevity 100
- inputs: {"age_days": 2097, "days_push": 3, "days_rel": 180, "gap_med": 13, "n_releases_24m": 20}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1026, forks 286 (observed 2026-09-01T02:13:58.009973+00:00)

## What it is
web-ifc is a JavaScript/TypeScript library backed by a C++ WASM module for reading and writing IFC (BIM) files at native speeds. It is part of the That Open Company ecosystem for building open BIM applications.

## Use cases
- parse IFC building model files in JavaScript
- extract geometry from IFC models for 3D rendering
- read and write BIM data in a web app
- load IFC files in Node.js at native speed
- convert IFC model properties to JSON
- build open-source BIM viewer applications

## When to choose
- you need fast IFC parsing/writing in JavaScript or TypeScript
- you are building a web or Node.js BIM application
- you want an open-source alternative to proprietary IFC toolkits

## When to avoid
- you need to process formats other than IFC
- you need a full BIM authoring tool rather than a parsing library
- your environment cannot run WASM modules

## Facets
- artifact type: library
- maturity: active
- function: parser, serialization, wasm, sdk, developer-tools
- domain: files, web-development, developer-tools, graphics
- platform: browser, wasm, cross-platform
- tags: ifc, bim, building-information-modeling, cad, geometry, emscripten, typescript, construction, nodejs, web-server

## Member repositories
- ThatOpen/engine_web-ifc (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-09-01T02:13:58.009973+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:08:42.002028+00:00, confidence not recorded.
  - readme: https://github.com/ThatOpen/engine_web-ifc (fetched 2026-09-01T02:13:58.009973+00:00, sha 28ba8b3537f2)
  - homepage: https://thatopen.github.io/engine_web-ifc/demo (fetched 2026-08-29T13:08:57.997967+00:00, sha d863514bb423)
- Data as of 2026-08-30T08:39:29.467469+00:00.