Do you get an error message: Excel cannot open the tệp tin **.xlsx because the file format or tệp tin extension is not valid? Quick fixes và advanced solutions are offered here lớn help you fix this error on Microsoft Office 2007, 2010, 2013, or 2016. Besides, if you lost Excel files, you can tải về linhkiem.vn data recovery software to lớn get additional help.Bạn vẫn xem: file excel bị lỗi file format not valid


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3 Fixes for Excel Cannot xuất hiện the file Because the Extension Is Not Valid

The tệp tin format of an Excel worksheet is .xlsx or .xls. Whenever the user opens any file, it is opened with the same extension. However, some users may encounter an error when trying to mở cửa or edit an Excel tệp tin in Office 2003, 2007, 2010, 2013, 2016, 2019, và 365. The error message displays, "Excel cannot xuất hiện the tệp tin because the extension is not valid".

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This article will provide you with three effective solutions to resolve excel cannot xuất hiện the file because the file format or file extension is not valid. You can change the file extension, use the Office repair utility, or use one of the best data recovery software to lớn repair Excel files. 

Workable SolutionsStep-by-step Troubleshooting
Fix 1. Change tệp tin ExtensionOpen Microsoft Excel & go lớn "File" > click Export & choose Change tệp tin Type...Full steps
Fix 2. Use open and RepairStart Office Excel > click file and mở cửa > select the inaccessible Excel file...Full steps
Fix 3. linhkiem.vn file Repair ToolLaunch linhkiem.vn Data Recovery Wizard, & then scan the corrupted or damaged Excel files...Full steps

Error "Excel Cannot mở cửa the tệp tin Because The file Format or file Extinction Is Not Valid"

Sometimes, when you try to xuất hiện or edit an Excel tệp tin on Microsoft Office 2003, 2007, 2010, 2013, 2016, 2019, or 365 you may encounter the following problem:

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


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It usually indicates the tệp tin is not compatible with the Excel version of the file that has come corrupt or damaged. Here, we will show you all the possible solutions, & you can try them respectively until fixing the issue. Before you take the solutions, check whether Excel can be used normally.

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

Step 2. If Excel opens normally, kiểm tra for any add-ins that are causing problems in Excel. Disable the add-ins and click on the "OK" button. Then, restart Excel to check if the problem is fixed. If not, move on lớn the fixes below.


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

Fix 1. Change the Excel tệp tin Extension to xuất hiện It

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

Step 1. xuất hiện Microsoft Excel and go to the "File" tab.

Step 2. Click "Export" and choose "Change file Type".

Step 3. Change the tệp tin extension khổng lồ any other tệp tin format that MS Excel supports and click "Save As". Then, kiểm tra if Excel can xuất hiện your tệp tin or not.


Fix 2. Open Excel file Using the open and Repair Feature

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

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

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

Step 3. Click the down arrow on the open button, & then click "Open & Repair". Microsoft Office will then start to kiểm tra the Excel document and repair problems or corruption it found. 


Fix 3. Use linhkiem.vn file Repair Tool khổng lồ Fix Excel Cannot xuất hiện the File

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

linhkiem.vn Data Recovery Wizard is an all-in-one tool that can help recover deleted files và restore corrupt files easily & efficiently. It can help to lớn 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.

Why You Choose linhkiem.vn Data Recovery Tool

Recover corrupted Excel files in XLSX/XLS formatsRepair single or multiple Excel file without quantity limitSupports MS Excel 2019, 2016, 2013, 2010, 2007, 2003, XP, 2000, 97, & 95 versionsReal-time preview of repairing corrupted Excel file

Now, download the linhkiem.vn MS Office document repair tool and follow the step-by-step guides below khổng lồ repair damaged Excel files with three steps.

Step 1. Select a location khổng lồ start finding corrupted Excel files

Launch linhkiem.vn Data Recovery Wizard, & then scan the corrupted or damaged Excel files.


Step 2. Scan for the corrupted Excel document


Step 3. Repair & save the Excel file to a secure location

Double-click the corrupt excel file, & this program will automatically repair corrupted và damaged Excel files. Click "Recover" to save the repaired Excel files khổng lồ a safe location.


Recover Excel tệp tin When the File Format or tệp tin Extension Is Not Valid

If your unsaved Excel file cannot be opened because the file format or tệp tin extension is not valid, how to lớn recover unsaved Excel files? Try the two ways below. 

1. Restore Unsaved Excel Wordbook from Previous Versions

This method can only restore lost files to lớn a previous version. It means that you may lose some changes you may have made to lớn the document.

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


Step 2. open the "Previous Version" tab to menu all the previously stored versions of the Excel file.

Step 3. Choose the right version and click "Restore" to retrieve the document.


2. Restore Unsaved Excel tệp tin Using AutoRecover

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

Step 1. mở cửa Office Excel and go to lớn the "File" tab > click "Info".

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


Step 3. Open the file in Excel và click "Restore". 


Step 4. Save the tệp tin with another tệp tin name & set the extension as .xlsx.

Worthy Tips to lớn Prevent Excel tệp tin from Loss

There are many ways to prevent data loss. If you have lost important Excel files due khổng lồ careless deletion, hard drive formatting, or vi khuẩn attack, you can use the data recovery tool khổng lồ retrieve 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 tệp tin with file Recovery Software

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

Give it a try khổng lồ get your lost Excel back immediately:

Step 1. Select location and click "Scan"

Choose the drive X: or a specific folder on Desktop or somewhere else where you lost the excel files, and then click "Scan".


Step 2. Locate your excel files

To quickly find the Excel files from the scan results, click on the "Filter" on the đứng top area, choose "Excel", và click tree view on the left side. Or, search .xls or .xlsx in the tìm kiếm box. 


Step 3. Preview and recover

You can double click on the Excel file to preview its integrity. Finally, select the desired Excel files & click "Recover".


2. Back-Up Excel file Automatically 

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


Final Words

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

If Excel cannot mở cửa the tệp tin problem is due to tệp tin corruption, linhkiem.vn file 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, & other files on the hard drive, SD card, memory card, 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 lớn Excel cannot xuất hiện the file because the tệp tin format or file extension is not valid. If you also have any of these problems, you can find the methods here.

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

You can try to lớn fix Excel cannot mở cửa the file because the tệp tin format or file 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 tệp tin Type".

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

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

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

Xem thêm: 7 Cách Chuyển File Img Sang Pdf Trực Tuyến Miễn Phí, Jpg Sang Pdf

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

What does file extension not valid mean?

"Excel cannot mở cửa 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 a .xlsx file, 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 file is not compatible with the version of MS Excel you"re using.

Why can"t I xuất hiện an XLSX file?

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