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File extension.numbers
CategoryDocument File
DescriptionFiles with a .numbers extension are created by Apple's "Numbers" application which forms part of Apple's iWork office suite, a set of applications which run on the Mac OS X and iOS operating systems, and also includes Keynote (for presentations) and Pages (for word processing).

Numbers 1.0 on OS X was first announced on August 7 2007, and the .numbers file contains many of the standard features of a spreadsheet with support for rows, columns, graphs, formulas and charts. The iPad version of Numbers was released in January 2010, and the most recent version of Numbers on OS X is version 3.5 released in November 2014 as part of Apple's iWork '14 update.

As with other products in the iWork suite Numbers includes a variety of layouts designed by professional illustrators and also includes support for importing documents from Microsoft's Office suite (in this case Excel spreadsheets).

The key advances in Numbers are summarised below:

VersionDateKey features
1.0August 2007First version - basic features.
2.0January 2009Adds features to allow charts in Keynote and Pages to be automatically updated when changed in Numbers files.
2.1July 2011Support added for OS X Lion features such as "full screen", "resume", "auto save" and "versioning".
2.2July 2012Includes features for integration with iCloud, retina display support and dictation features.
2.3December 2012Includes improved compatibility with Excel documents, the ability to hide and unhide rows and columns amd filters.
3.0October 2013Launched with a new UI to match that found in Pages and Keynote, and also includes the ability to create interactive charts.
3.5October 2014New OS X Yosemite inspired design, support for iCloud drive, and an updated Numbers file format.

Actions NUMBERS to XLSX - Convert file now
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Technical DetailsA .numbers file is actually a compressed ZIP file comprised of a number of other different files combined that together make up a .numbers file. The most recent version of Numbers saves files with an "Index" directory containing Apple's proprietary IWA file format, a "Metadata" directory with .plist files and one or more jpg files for allowing quick previews. Similar to Microsoft products, the .numbers file type suffers from a lack of compatibility with other leading spreadsheet programs.
Associated programs Apple iWork
Numbers 2.1
Numbers 2.2
Numbers 2.3
Numbers 3.0
Numbers 3.5
Developed by Apple
MIME type  application/x-iwork-numbers-sffnumbers
Useful links MacWorld review of Numbers 3.5
Ars Technica review of iWork '14
Numbers supported file formats
More information on Numbers
Official Apple iWork Numbers details
Convert NUMBERS file

Convert NUMBERS file

Using Zamzar it is possible to convert NUMBERS files to a variety of other formats:

numbers to csv (Comma Separated Values)
numbers to numbers09 (Apple iWork '09 Numbers Spreadsheet)
numbers to pdf (Portable Document Format)
numbers to xls (Microsoft Excel Spreadsheet)
numbers to xlsx (Microsoft Excel 2007 Spreadsheet)

NUMBERS to XLSX - Convert file now


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File extension.xlsx
CategoryDocument File
DescriptionAs part of Microsoft's 2007 Office suite of products another open XML document type was introduced. This time in the Excel sphere, Excel is known world wide. It is a powerful tool you can use to create and format spreadsheets, graphs, do complex maths and much more. You are able to create diverse spreadsheets with multiple workbooks, formulae, and various data sources. Files can be saved in the XLSX format, which is based on the Open XML format and uses ZIP compression for smaller file sizes.
Actions NUMBERS to XLSX - Convert file now
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Technical DetailsXLSX improves file and data management and data recovery. XLSX extends what is possible with the binary files of earlier versions. Any application that supports XML can access and work with data in the new file format. The application does not need to be a Microsoft product it can be any application. Users can also use standard transformations to extract or repurpose the data. In addition, security concerns are drastically reduced because the information is stored in XML, which is essentially plain text. Thus, the data can pass through corporate firewalls without hindrance.
Associated programs Microsoft Excel 2007
OxygenOffice Progessional (Linux)
Developed by Microsoft
MIME type  application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Useful links More detail about the XLSX format
Convert XLSX file