This corrupt Excel file repair online service does not restore password-protected workbooks and worksheets.File in Use" error opening Excel 2007 Files.xlsx because the file format or file extension is not valid. Excel error "cannot open file because the file format or file extension is not valid.".The file is corrupt and cannot be opened.The document Filename caused a serious error the last time it was opened.Microsoft Excel has encountered a problem and needs to close.Excel found unreadable content in filename.xlsx.This file is not in a recognizable format.Excel cannot complete this task with available resources.Or, the server the document is stored on may not be responding. The file may be read-only, or you may be trying to access a read-only location. We found a problem with some content in 'FileName.xlsx (xls)'.Do you want us to try to recover as much as we can? If you trust the source of this workbook, Click Yes.Apart from this, the service will help fix the following errors in files: Our Microsoft Excel repair files service will help restore Excel files of earlier versions, such as Microsoft Excel 97, 98, 2000, XP, 2003. How to fix a corrupted XLS file of an earlier version of Microsoft Excel Embedded objects, such as images, charts, notes and such.Protection of ranges, sheets and file in general.Unfortunately, we cannot recover some information from Excel files, for example: If you don't have a backup copy of a damaged Microsoft Excel XLSX/XLS file, just upload it to the service with one click and find out how you can save the data. How to repair corrupted Microsoft Excel file online?