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Isabella Garcia's avatar
Isabella Garcia
Copper Contributor
Sep 11, 2018
Solved

The file format and extension of “filename.xls” don’t match

Hi

Error message after opening Excel file:

‘The file format and extension of “filename.xls” don’t match. The file could be corrupted or unsafe. Unless you trust its sources, don’t open it. Do you want to open it anyway?’

  

I already tried:
1. Open and repair
2. Add-in deletion (COM)
3. Trust center setting

 

Thanks in advance. 

 

  • Robin Shanab's avatar
    Robin Shanab
    Sep 13, 2018

    Dear Isabella,

     

    You can read all information on the page. As demo is available then, make a copy of your file and repair it. As I know, it shows preview of repairable data. 

    These are the features of the software: 

    Let me know.

    I hope you will fix it.

     

    Thanks,

    Robin

4 Replies

  • Robin Shanab's avatar
    Robin Shanab
    Iron Contributor

    Hello Isabella,

     

    Did you try to open your Excel file in Safe mode?

    Did you try to change the file extension from .xls to .xlsx?

     

    Read my reply of this forum: https://social.technet.microsoft.com/Forums/office/en-US/aecedc3e-d1d6-44e4-868c-b3bc15927ab6/how-to-repair-and-recover-corrupt-ms-excel-file

     

    Regards,

    Robin

    • Isabella Garcia's avatar
      Isabella Garcia
      Copper Contributor

      Thank you Robin for your Quick Reply. 

       

      My file is not opening in safe mode.

      I tried to change file extension but, not worked. 

       

      I visited link and downloaded the demo version this software: https://www.stellarinfo.com/repair-excel-file.php

       

      Can you share more about this software?

       

      Thanks

      Isabella

      • Robin Shanab's avatar
        Robin Shanab
        Iron Contributor

        Dear Isabella,

         

        You can read all information on the page. As demo is available then, make a copy of your file and repair it. As I know, it shows preview of repairable data. 

        These are the features of the software: 

        Let me know.

        I hope you will fix it.

         

        Thanks,

        Robin

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