Editing Microsoft Excel (section)

==== Current file extensions ====
{{Main|Office Open XML}}

Microsoft Excel 2007, along with the other products in the [[Microsoft Office 2007]] suite, introduced new file formats. The first of these (.xlsx) is defined in the Office Open XML (OOXML) specification.

{| class="wikitable"
|+Excel 2007 formats
!Format
!Extension
!Description
|-
|Excel Workbook
|{{code|.xlsx}}
|The default Excel 2007 and later workbook format. In reality, a [[ZIP (file format)|ZIP]] compressed archive with a directory structure of [[XML]] text documents. Functions as the primary replacement for the former binary .xls format, although it does not support Excel macros for security reasons. Saving as .xlsx offers file size reduction over .xls<ref>{{Cite book|last=Fairhurst|first=Danielle Stein|url=https://books.google.com/books?id=oSXWBgAAQBAJ&pg=PA324|title=Using Excel for Business Analysis: A Guide to Financial Modelling Fundamentals|date=March 17, 2015|publisher=John Wiley & Sons|isbn=978-1-119-06245-5|language=en}}</ref>
|-
|Excel Macro-enabled Workbook
|{{code|.xlsm}}
|As Excel Workbook, but with macro support.
|-
|Excel Binary Workbook
|{{code|.xlsb}}
|As Excel Macro-enabled Workbook, but storing information in binary form rather than XML documents for opening and saving documents more quickly and efficiently. Intended especially for very large documents with tens of thousands of rows, and/or several hundreds of columns. This format is very useful for shrinking large Excel files as is often the case when doing data analysis.
|-
|Excel Macro-enabled Template
|{{code|.xltm}}
|A template document that forms a basis for actual workbooks, with macro support. The replacement for the old .xlt format.
|-
|Excel Add-in
|{{code|.xlam}}
|Excel add-in to add extra functionality and tools. Inherent macro support because of the file purpose.
|}