LỖI EXCEL CANNOT OPEN THE FILE

Did you get an error message of "Excel cannot open the tệp tin **.xlsx because the file format or tệp tin extension is not valid" while trying lớn open a file?Quiông xã fixes & advanced solutions are available here to lớn fix this problem và access your document.

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Many users may encounter an error when trying to open or edit an Excel tệp tin in Office 2003, 2007, 2010, 2013, năm 2016, và 2019. The error message displays, "Excel cannot open the file because the extension is not valid". This article will provide you with the effective sầu solutions lớn resolve sầu Excel cannot open the file error, và get your MS Excel data baông xã right here now.


Workable SolutionsStep-by-step Troubleshooting
Fix 1. Change File Extensionxuất hiện Microsoft Excel và go to "File" > cliông chồng Export và choose Change File Type...Full steps
Fix 2. Open in Safe ModePress Windows+R key, type: excel.exe pháo /safe & clichồng "OK" > Save the tệp tin as .xlsx...Full steps
Fix 3. Use mở cửa and RepairStart Office Excel > clichồng File và Open > select the inaccessible Excel file...Full steps
Fix 4. neftekumsk.com File Repair ToolUse neftekumsk.com MS Office document repair tool khổng lồ fix corrupted or damaged Excel files when Excel cannot ...Full steps

Error "Excel Cannot xuất hiện the File Because the File Format or File Extinction Is Not Valid"

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Sometimes, when you try lớn open or edit an Excel tệp tin on Microsoft Office 2003, 2007, 2010, 2013 or năm nhâm thìn, you may encounter the following problem:

"Excel cannot open the tệp tin "filename.xlsx" because the file format or file extension is not valid. Verify that the tệp tin has not been corrupted & that the tệp tin extension matches the format of the tệp tin."

It usually indicates the file is not compatible with the Excel version or the file has come corrupt or damaged. In this article, we will show you all the possible solutions, và you can try them respectively until fixing the issue. 

4 Effective sầu Fixes for Excel Cannot mở cửa the File Because the Extension Is Not Valid

There are four useful solutions in total to lớn solve the Excel cannot open the tệp tin issue. Besides, two methods are provided to lớn recover Excel when the file format or tệp tin extension is not valid. 

Fix 1. Change the Excel File Extension

Many times, this error occurs due to lớn the incompatible file extension of the Excel file. MS Excel saves Excel workbooks as XLSX or XLS file by mặc định. Excel 2003 và earlier version save sầu files as XLS, whereas Excel 2007 và later versions like the Excel 2010, Excel 2013, Excel năm 2016 và 2019 save sầu files in XLSX tệp tin format. You can change the default tệp tin format for the corresponding Excel version to any other tệp tin format supported by MS Excel.

Step 1. mở cửa Microsoft Excel và go khổng lồ the "File" tab.

Step 2. Click "Export" & choose "Change File Type".

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Step 3. Change the file extension to lớn any other tệp tin format that MS Excel supports and cliông chồng "Save As". Then, Cheông chồng if Excel can open your tệp tin or not.

Fix 2. Open the Excel File in Safe Mode and Disable Add-ins

If Excel cannot open the tệp tin, try running Excel in safe mode khổng lồ see if it can be accessed successfully. This method also checks if there are any errors in MS Excel.

Step 1. Press Windows+R key, type excel.exe /safe, và clichồng "OK". Loading Excel without templates and add-ins allows you khổng lồ see if the program works as it should or if it is corrupted.

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Step 2. If Excel opens normally, kiểm tra for any add-ins that are causing problems in Excel. Disable the add-ins và click on the "OK" button.

Step 3. Restart Excel khổng lồ kiểm tra if the problem is fixed. If not, move on to lớn the next approach.

Fix 3. Open Excel File Using xuất hiện & Repair Feature

The "Open và Repair" is a built-in easy-to-handle MS Excel utility that allows you to correct the error Excel cannot open the tệp tin because the file format or file extension is not valid.

Step 1. Start Office Excel. On the File menu or the Microsoft Office button, cliông chồng "Open".

Step 2. In the Open dialog box, cliông xã lớn select the inaccessible Excel file.

Step 3. Cliông chồng the down arrow on the xuất hiện button, and then click "mở cửa and Repair". Microsoft Office will then start to kiểm tra the Excel document and repair problems or corruption it found. 

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Fix 4. Use neftekumsk.com File Repair Tool khổng lồ Fix Excel Cannot mở cửa the File

If Excel cannot open the file because the extension is not valid problem is caused by tệp tin corruption rather than tệp tin compatibility, you need a professional tệp tin repair program to lớn help you fix the problem. 

neftekumsk.com Data Recovery Wizard is an all in one tool that can help recover deleted files & restore corrupt files easily & efficiently. It can help to repair corrupted JPEG/JPG or recover damaged MP4 và MOV files on both Windows và Mac computers. 


This professional MS Office Excel file repair tool has the following salient features.

Now, download neftekumsk.com MS Office document repair tool for free & follow the step-by-step guides below lớn repair damaged Excel files with three steps.

Step 1. Select a location to start finding corrupted Excel files

Launch neftekumsk.com Data Recovery Wizard, & then scan the corrupted or damaged Excel files.

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Step 2. Repair and recover corrupted Excel document

First, find the damaged files through the filter, file path, tìm kiếm, etc.

Second, preview và repair. This program will automatically repair corrupted & damaged Excel files.

Xem thêm: Hướng Dẫn Cách Quét Mã Vạch Trên Iphone Và Điện Thoại Android

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Tip: It supports single file kích thước recover unsaved Excel file? Try the two ways below. 

1. Restore Unsaved Excel Wordbook from Previous Versions

This method can only restore lost files khổng lồ a previous version. It means that you may thua trận some changes you may have made khổng lồ the document.

Step 1. Right-cliông xã the inaccessible Excel document và choose "Properties".

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Step 2. xuất hiện the "Previous Version" tab to danh sách all the previously stored version of the Excel tệp tin.

Step 3. Choose the right version and cliông chồng "Restore" to lớn retrieve sầu the document.

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2. Restore Unsaved Excel File Using AutoRecover

This method only works when you have turned on the AutoSave sầu feature in Office Excel. And it"s also helpful for recovering unsaved Word document. 

Step 1. xuất hiện Office Excel and got lớn the "File" tab > cliông chồng "Info".

Step 2. Besides Manage Versions, you"ll see all autosaved versions of your file.

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Step 3. mở cửa the tệp tin in Excel & cliông chồng "Restore". 

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Step 4. Save sầu the tệp tin with another tệp tin name and mix the extension as .xlsx.

Worthy Tips to Prsự kiện Excel File from Loss

There are many ways lớn prsự kiện data loss. If you have lost important Excel files due to careless deletion, hard drive formatting, or virut attaông xã, you can use the data recovery tool to retrieve sầu lost data. There is another crucial point lớn avoid data loss, which is backing up your Excel tệp tin at any time. 

1. Recover Deleted or Lost Excel File with File Recovery Software

Except for restoring unsaved Excel caused by Excel crashes when saving or other reasons, many users need to recover lost excel spreadsheets caused by accidental deletion, OS crash, hard drive sầu damaged/corrupted, or lost partition. On this occasion, you have sầu to resort lớn a professional tệp tin recovery tool for help. And neftekumsk.com file recovery software is worth to try. It allows you to recover deleted DOC/DOCX, XLS/XLSX, PPT/PPTX, PDF, CWK, HTML/HTM, INDD, EPS, etc. with a few clicks.

Give sầu it a try to get your lost Excel baông xã immediately:


Step 1. Specify a location.

Run neftekumsk.com Data Recovery Software. Choose the drive X: or a specific thư mục on Desktop or somewhere else where you lost the excel files, & then cliông chồng "Scan".


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Step 2. Scan for data.

During the scan, you"ll see more and more data showing up very quickly in the "Deleted files" result. Wait for the scanning process finishes. To quickly find the Excel files from the scan results, click on the "Filter" on the top area và choose "Excel". Or, search .xls or .xlsx in the Search box. 


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Step 3. PReview & recover.

You can double clichồng on the Excel tệp tin to pĐánh Giá its integrity. Finally, select the desired Excel files & clichồng "Recover".


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2. Baông chồng Up Excel File Automatically 

If you need to lớn modify và change your worksheet frequently, turning on the AutoSave feature is also necessary. Or you can also copy & backup your tệp tin lớn another safe location manually in case of accidents.

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Final Words

"Excel cannot open the tệp tin "(filename)" .xlsx because the file format for tệp tin extension is not valid" is a usual error that you can face while opening an Excel tệp tin. With the help of the above methods, this error can easily be resolved without data loss.

If Excel cannot open the file problem is due to lớn file corruption, neftekumsk.com tệp tin repair tool can help you fix và recover the Excel file with a few clicks in a short time. It is good at repairing photos, videos, documents, and other files on the hard drive, SD thẻ, memory thẻ, or any other storage medium. No matter they are lost or existed on your devices. It"s worth a shot.


Excel Cannot Open the File Because the Extension Is Not Valid FAQs

The following four frequently asked questions are highly related to Excel cannot open the file because the file format or file extension is not valid. If you also have sầu any of these problems, you can find the methods here.

How vày I fix file format or tệp tin extension is not valid?

You can try to fix Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid by changing the tệp tin extension:

Step 1. mở cửa your Excel file. On the taskbar, select "File". Then select "Options" > "Export" > "Change File Type".

Step 2. You can directly change the tệp tin extension depending on the version of Excel installed. Click "Save As". Then, check if the error "Excel cannot open the file" is resolved or not.

How vì I recover an Excel tệp tin format or file extension is not valid?

You can restore Excel tệp tin format, or tệp tin extension is not valid from previous versions.

Select the damaged file. Right-click it and click "Properties" > "Previous Version". A danh sách of previous versions will appear; you need khổng lồ select the option you are interested in and cliông xã "Restore" lớn recover. Previous versions come tệp tin File History or from restore points.

What does file extension not valid mean?

"Excel cannot open the tệp tin "(filename)" .xlsx because the file format for file extension is not valid" is a comtháng error that many users may encounter while opening an. xlsx tệp tin, especially when opening a spreadsheet received through an email. The possible reasons for this issue might be:

The Excel tệp tin is corrupt or damaged.The Excel tệp tin is not compatible with the version of MS Excel you"re using.

Why can"t I open an XLSX file?

When the Excel file is corrupted, not compatible with the Excel version, infected by the virus, or received by tin nhắn are the common cause of "Excel cannot open the file because the tệp tin format or tệp tin extension is not valid" problem. Any of these problems appear, you could not open an XLSX tệp tin.