I want to create online calculators for my website using my excel spreadsheets. I stumbled upon SpreadsheetConverter (a plugin in excel) and looks like it is a great solution. I am still new at it and playing with the functions. I am currently on the trial. Has anyone used this before? What are your experiences?

I want my spreadsheets to mine and not hosted on some third party server and/or be owned by a 3rd party then I have to continuously pay for the software in order to use my spreadsheets. So I am weary of this software, it does not look like that is the case but it is hard for me to tell. It does have html and java (node.js) export-ability. Does anyone have experience with this?

Are there any other simple to use solutions out there?

Thanks in advance for your help!