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Lỗi excel cannot open the file

11:32, 12/04/2021

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

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


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

Error "Excel Cannot mở cửa the File Because the File Format or File Extinction Is Not Valid"

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Sometimes, when you try to lớn open or edit an Excel tệp tin on Microsoft Office 2003, 2007, 2010, 2013 or năm 2016, you may encounter the following problem:

"Excel cannot open the tệp tin "filename.xlsx" because the tệp tin format or tệp tin extension is not valid. Verify that the file has not been corrupted and that the file 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, & you can try them respectively until fixing the issue. 

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

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

Fix 1. Change the Excel File Extension

Many times, this error occurs due lớn the incompatible file extension of the Excel file. MS Excel saves Excel workbooks as XLSX or XLS tệp tin by default. Excel 2003 and earlier version save sầu files as XLS, whereas Excel 2007 & later versions like the Excel 2010, Excel 2013, Excel năm nhâm thìn & 2019 save sầu files in XLSX file 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. xuất hiện Microsoft Excel và go to lớn the "File" tab.

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

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

Fix 2. mở cửa the Excel File in Safe Mode và Disable Add-ins

If Excel cannot open the tệp tin, try running Excel in safe mode to lớn 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, & click "OK". Loading Excel without templates và 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 and clichồng on the "OK" button.

Step 3. Restart Excel to check if the problem is fixed. If not, move sầu on to the next approach.

Fix 3. mở cửa Excel File Using xuất hiện và Repair Feature

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

Step 1. Start Office Excel. On the File thực đơn or the Microsoft Office button, clichồng "Open".

Step 2. In the Open dialog box, cliông chồng khổng lồ select the inaccessible Excel file.

Step 3. Cliông chồng the down arrow on the Open button, & then clichồng "Open & Repair". Microsoft Office will then start lớn check the Excel document and repair problems or corruption it found. 

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Fix 4. Use aiesec-unwe.net File Repair Tool to Fix Excel Cannot Open the File

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

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


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

Now, tải về aiesec-unwe.net MS Office document repair tool for không lấy phí & follow the step-by-step guides below to lớn repair damaged Excel files with three steps.

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

Launch aiesec-unwe.net Data Recovery Wizard, và then scan the corrupted or damaged Excel files.

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Step 2. Repair và recover corrupted Excel document

First, find the damaged files through the filter, tệp tin path, search, etc.

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

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

1. Restore Unsaved Excel Wordbook from Previous Versions

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

Step 1. Right-cliông chồng the inaccessible Excel document and choose "Properties".

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Step 2. mở cửa the "Previous Version" tab to menu all the previously stored version of the Excel file.

Step 3. Choose the right version và cliông xã "Restore" to lớn retrieve 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. mở cửa Office Excel and got khổng lồ the "File" tab > click "Info".

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

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Step 3. Open the file in Excel và cliông chồng "Restore". 

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Step 4. Save the file with another tệp tin name và mix the extension as .xlsx.

Worthy Tips to lớn Prsự kiện Excel File from Loss

There are many ways to lớn prsự kiện data loss. If you have sầu lost important Excel files due khổng lồ careless deletion, hard drive formatting, or vi khuẩn attaông chồng, you can use the data recovery tool to lớn retrieve lost data. There is another crucial point to 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 khổng lồ recover lost excel spreadsheets caused by accidental deletion, OS crash, hard drive damaged/corrupted, or lost partition. On this occasion, you have khổng lồ resort khổng lồ a professional tệp tin recovery tool for help. And aiesec-unwe.net tệp tin recovery software is worth khổng lồ 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 aiesec-unwe.net Data Recovery Software. Choose the drive sầu X: or a specific folder on Desktop or somewhere else where you lost the excel files, & then click "Scan".


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Step 2. Scan for data.

During the scan, you"ll see more và 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, cliông xã on the "Filter" on the top area và choose "Excel". Or, tìm kiếm .xls or .xlsx in the Search box. 


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Step 3. Preview and recover.

You can double click on the Excel file lớn pđánh giá its integrity. Finally, select the desired Excel files và clichồng "Recover".


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2. Baông xã Up Excel File Automatically 

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

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Final Words

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

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


Excel Cannot mở cửa the File Because the Extension Is Not Valid FAQs

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

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

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

Step 1. mở cửa your Excel tệp tin. 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. Cliông xã "Save sầu As". Then, check if the error "Excel cannot open the file" is resolved or not.

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

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

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

What does tệp tin extension not valid mean?

"Excel cannot open the file "(filename)" .xlsx because the file format for file extension is not valid" is a common error that many users may encounter while opening an. xlsx tệp tin, especially when opening a spreadsheet received through an gmail. 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 vi khuẩn, or received by gmail are the comtháng cause of "Excel cannot open the tệp tin because the tệp tin format or file extension is not valid" problem. Any of these problems appear, you could not open an XLSX file.