I have a complicated Excel workbook that I want to build a public website frontend for, so users can enter their inputs and have the Excel-generated results/charts display in response. Embedding the entire workbook via iframe from OneDrive-Personal or -Business/Sharepoint nearly works but it times out too quickly (~12 minutes). I also looked at Excel Services, but my understanding is that only works from a Sharepoint site, not a public webpage. Am I missing any options?