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Solved: Excel Cannot Open the File Because the Extension Is Not Valid
![Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]](https://www.isunshare.com/images/article/office/fixed-excel-cannot-open-the-file-because-the-file-format-or-file-extension-is-not-valid/excel-cannot-open-the-file.png "Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]")
Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]
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