What is a .XLS file?
XLS is the classic Microsoft Excel spreadsheet format. Created and opened by Microsoft Excel.
- Did you know
- XLS was Excel’s binary format until XLSX replaced it in 2007.
- XLS uses Microsoft’s BIFF (Binary Interchange File Format) and is capped at 65,536 rows per sheet because Excel addressed rows with 16 bits.
- A .XLS file uses Microsoft's OLE Compound File container - the same wrapper as the legacy .doc and .xls binaries.
- What Analyser shows you
- Open and read Microsoft Office documents - modern Word, Excel and PowerPoint (DOCX, XLSX, PPTX), their template, macro-enabled and slideshow variants (DOTX, XLTX, POTX, DOCM, XLSM, PPTM, PPSX), and the legacy 97-2003 binaries (DOC, XLS, PPT) - plus the OpenDocument family in every shape: zipped and flat single-XML text, spreadsheets, presentations and graphics (ODT, ODS, ODP, ODG, FODT, FODS), templates (OTT, OTS, OTP, OTG), legacy StarOffice (SXW, SXC, SXD), and EPUB e-books, shown as page previews with selectable text, tables, sheets and slides.
- Open a .XLS file
- Drag a .XLS file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.