A file with the XLSX file extension is a Microsoft Excel Open XML Format Spreadsheet file. It's a ZIP-compressed, XML-based ...

Linux tends not to care about file extensions, but apps are still free to behave however they want. ... For example, an XLSX file is a type of compressed file, so the extension is important.

OpenOffice.org spreadsheets default to a .xsc file extension, which certain versions of Excel ... Microsoft Excel offers a pre-2007 file extension of .xls and a post-2007 file extension of .xlsx.

Under the File name field, change the extension from ‘.xlsx’ to ‘.xls’ and save it. Try opening the file again. 2] Use the Open and Repair feature in Excel ...

It also enhances the readability of file listings by hiding known file extensions (such as .xlsx for Excel files or .docx for Word files) so that it’s less confusing for you to find what you ...

In comparison, an XLSX file is a regular Excel spreadsheet that doesn't contain this type of code and doesn't require any special steps to open the file and start working.

But Excel 2007, with the new .xlsx file extension, uses file compression, which shrinks spreadsheet files up to 75% of their girth in the earlier .xls format. Of course, that does you no good if ...

Yes, a .docx file is really a .zip archive (I told you it was compressed). Most of what you find inside are .xml files–another open standard. That experiment will also work on .xlsx and .pptx files.

Microsoft is making it easier to change your default file associations by adding a new search feature that lets you quickly find the extension you wish to modify.