How do i fix file format or file extension is not valid in excel

How do you solve Excel cannot open the file because the file format or file extension is not valid. How do I fix file format or file extension is not valid in Excel

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[fanyanimarin]

Gracias me funcionó, pensé debía volver a repetir mi trabajo y gracias por los subtítulos 🫡

[Anthony-ozwv]

what if it happens to all excel files in my pc? its kinda annoying to repeat it on all of my excel files

[frenjeskaschoop]

None of the methods above worked for me nor did the others that I tried. I just had to restore my file to an older version of the file. And it did the job. right click on the file, go to show more options, then click on version history choose the time or the day the file was still working or could be opened, and then click Restore. Try and see if your file can be opened after that, keep in mind you will lose data that was saved after the time or date you chose. If that data is important, then don't try this.

[kesharjanbam]

excel not open please open the spreadsheet and select the correct range in autocad in problem

[nagulakondaradhika]

2 methods are not working for me what to do

[gandhinegara]

still doesnt work.. the file size is 0 and i dnt know how to get it back :(

[MohanDasU-kl]

The both methods are not working...
Anynone can help me

[azyx]

nahi huaa sir plese mera data chla jayega

[mynewlife]

damn still did not work. I am trying to open excel expert practice workbooks

[dishoffice]

sir im try this tricks, but this not working, sir please help me

[vinashkari]

i dont have any antivirus prog in my laptop

[amritapritam]

Hi I have done this please tell the process of reversing it like earlier.

[tdmduc]

In my case there was no file but eitherway i kept getting this message.
I even re-installed M365 completely.
Turned out that Kutools plugin was the cause.
Disable and restart and it was gone.
After that Kutools could be re-enabled again.

[shahnawazahmed]

Both methods doesn't resolve issue

[mubarismubu]

I try to open like this
But does not work
Can you help me

[joseph]

These two methods none of them worked for me this is so annoying

[sarahzara]

Svp que ce que tu écris dans le tableau n'est pas clair ?