The cheminfo organization on GitHub was created in October 2012 in the group of Luc Patiny at EPFL. It gathers open-source JavaScript and TypeScript tools for chemistry, for the browser and Node.js: parsers and converters for analytical data (NMR, mass spectrometry, IR, Raman, UV-vis, XPS, chromatography and more), molecular formulas and structures with OpenChemLib JS, and web applications such as NMRium.
It contains 262 public repositories and 176 packages published on npm, downloaded 12,761,197 times in October 2026 and 114,569,372 times in the last 12 months (November 2025 to October 2026). Many of these packages are currently maintained by Zakodium Sàrl.
| Package | Oct 2026 | 12 months | ||
|---|---|---|---|---|
| 1 | is-any-array | 8,245,417 | 75,515,091 | Check if a value is any kind of array |
| 2 | cheminfo-types | 3,222,829 | 28,385,363 | Types for cheminfo packages and cheminfo data schema |
| 3 | netcdfjs | 381,611 | 3,795,637 | Read and explore NetCDF files |
| 4 | mrz | 265,128 | 1,393,773 | Parse MRZ (Machine Readable Zone) from identity documents |
| 5 | openchemlib | 138,598 | 803,181 | Manipulate molecules |
| 6 | uint8-base64 | 88,059 | 832,173 | Encode and decode base64 to and from Uint8Array |
| 7 | dynamic-typing | 42,516 | 311,738 | Dynamically type a string |
| 8 | ensure-string | 40,243 | 305,668 | Ensure that we receive a text even if an ArrayBuffer is sent |
| 9 | sdf-parser | 36,457 | 247,140 | SDF parser |
| 10 | eslint-config-cheminfo | 31,038 | 356,276 | Shared ESLint config for cheminfo and ml.js projects |
ml.jsMachine learning and numerical analysis in JavaScript 118 npm packages, 452 million downloads in the last 12 months |
image-jsImage processing and analysis in JavaScript 13 npm packages, 786 million downloads in the last 12 months |
Updated on 2026-11-03 from the GitHub and npm APIs. Repositories are the public ones of cheminfo, forks excluded. Downloads are those reported by npm for whole calendar months.