A .net library to write large Excel files in XLSX format with low memory consumption using streamed write. - salvois/LargeXlsx ...

This Python script uses the tabula-py and pandas libraries to convert a PDF file into an Excel file. Each table in the PDF file is written to a separate sheet in the Excel file.

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Word and Excel used the DOC and XLS file extensions, respectively, by default from 1997 until 2004. From 2004 onward, Microsoft made DOCX and XLSX the default file extensions.

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.