Google Sheets is an online spreadsheet app that lets you create and format spreadsheets and simultaneously work with other people. Here's what you can do with Google Sheets:
Import and convert Excel, .csv, .txt and .ods formatted data to a Google spreadsheet
Export Excel, .csv, .txt and .ods formatted data, as well as PDF and HTML files
Use formula editing to perform calculations on your data, and use formatting make it look the way you'd like
Chat in real time with others who are editing your spreadsheet
Create charts with your data
Embed a spreadsheet — or individual sheets of your spreadsheet — on your blog or website
For more information about Google spreadsheets, check out the Google Sheets getting started guide.