It wont get beyond the "Wait . . ." screen. It said that it would take less than 15 seconds. more than a minute is too long to wait
Create and edit xls and xlsx spreadsheets with OpenOffice Calc online
This extension allows creating, editing, and viewing Microsoft Excel spreadsheets in both xls and xlsx formats
It offers wizards for advanced spreadsheet functions, flexible cell formatting options, cross-tabulation and summarization, creating formulas using words, intelligent sum button, templates, advanced styles and formatting, and the ability to save spreadsheets in various formats
Integrated with a file manager for xls file management