    SheetJS Data Preview Live Demo
    (Base64 text works back to IE6; drag and drop works back to IE10)

    Source Code Repo
    Issues?  Something look weird?  Click here and report an issue
    Output Format:

    Drop a spreadsheet file here to see sheet data
     ... or click here to select a file

    ... or paste a base64-encoding here

    Advanced Demo Options:
    Use Web Workers: (when available)