File Extension

XLS File Format

Worksheet file (Microsoft Excel)

XLS file extension icon

XLS is a file extension for a spreadsheet file format created by Microsoft for use with Microsoft Excel. XLS stands for eXceL Spreadsheet.

Microsoft Excel files use a proprietary format for storing Microsoft Excel documents. This file format is known as the Binary Interchange File Format (BIFF). Data inside all Office Document files are stored in series of fixed-size streams. The location of each fixed-size stream is described by several sector allocation tables. These streams contain meta-data information about the document, such as the author name, subject, and individual sheet names. XLS files can also be opened by the Microsoft Excel Viewer, and OpenOffice.

MIME type: application/vnd.ms-excel, application/msexcel, application/x-msexcel, application/x-ms-excel, application/vnd.ms-excel, application/x-excel, application/x-dos_ms_excel, application/xls

 

Learn more about .XLS files:

Visit the Microsoft Excel web page

See answers to Excel file-related questions at ITKnowledgeExchange.com.

This was last updated in July 2010
Editorial Director Margaret Rouse

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

What made you want to look up XLS Worksheet file (Microsoft Excel)? Please tell us where you read or heard it (including the quote, if possible).

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.