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I would like to work with internal .xlsx files (styles.xml). I was using <oXygen/> to navigate through internal structure, but now it is throwing an error.
How to unpack xlsx files (and then pack them again)?
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When the Excel file is corrupted, not compatible with the Excel version, infected by the virus, or received by email, these are the common causes of the "Excel cannot open the file because the file format or file extension is not valid" problem. If any of these problems appear, you can't open your XLSX file.
File Viewer Lite is a free . XLSX and . XLS file opener that allows you to view Excel documents (including . XLSM files) in their native format without having to purchase and install Microsoft Excel.
Just install our software XLS Editor for Google Chrome™ To begin viewing and editing your XLS / XLSX files, simply do the following Install the software XLS Editor for Google Chrome™ Click on the software icon Find the XLS / XLSX file you wish to open Its that simple, begin viewing and editing your Excel files online ...
Unzip the file
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If you are using a mac, use the command-line unzip instead of the one built into Finder. I had the same headache until I switch to CLI.
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Try this in Windows:
Rename your file something.xlsx => something.xlsx.zip - you can then access it with File Explorer.
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