Free, browser-based versions of Word, Excel, and PowerPoint that require no installation and work on any device with internet access.
Excel 2019: Featuring new data analysis tools, formulas, and charts. Portable Microsoft Office 2019
If you're trying to decide if this is the right path for you, I can help you for Office 2019 versus lighter alternatives. Free, browser-based versions of Word, Excel, and PowerPoint
While the concept of "Portable Office" is convenient, it is important to understand the technical and legal landscape surrounding it. browser-based versions of Word
Microsoft does not officially release a "Portable" version of Office 2019. Most versions found online are created using third-party virtualization tools (like VMware ThinApp or Cameyo). Because these are not official releases, they may lack the stability of the standard installer and cannot receive automatic security updates.