WhichStat

Download & install

WhichStat is a modern Excel Add-in (Office.js) for Microsoft 365 Excel on Windows, Mac, and the web. Canonical URL: https://whichstat.com/download.

Install from the Insert tab — not File → Options. File → Options → Excel Add-ins only accepts legacy .xlam/.xll files and will not load WhichStat.
Get it from Microsoft Marketplace Download manifest.xml

AppSource listing is the primary path when live. Until then, sideload the manifest.

Excel on the web

  1. Open a workbook at excel.office.com.
  2. Insert → Add-ins → My Add-ins → Upload My Add-in.
  3. Browse to manifest.xml and Upload.

Excel for Windows

  1. Save manifest.xml in a folder (for example C:\WhichStat) and share it as a trusted catalog if your admin requires it.
  2. Insert → Add-ins → My Add-ins → Upload / Shared Folder → WhichStat.

Excel for Mac

  1. Insert → Add-ins → My Add-ins → Choose from File / Upload.
  2. Select manifest.xml.

Developer sideload: run pnpm dev:addin and point Excel at https://localhost:3000 (trust the cert first).