When you save a workbook as HTML, Excel may break the file down into separate component files. If only a single worksheet in the workbook contains data, Excel saves the workbook as a single file (Book1.htm, for example).
However, if multiple worksheets in the workbook contain data, Excel uses frames to display the worksheets in a browser. Excel saves the frameset file with the path and file name that you specify in the
Save As dialog box. It saves the worksheets as separate HTML files in a folder with the same name as the frameset file, as follows in this example:
- Book1.htm (frameset file)
- Book1_files (folder)
- Filelist.xml
- Sheet001.htm
- Sheet002.htm
- Sheet003.htm
- Stylesheet.css
- Tabstrip.htm