Do you get an error message: Excel cannot open the tệp tin **.xlsx because the tệp tin format or file extension is not valid? Quiông chồng fixes và advanced solutions are offered here to help you fix this error on Microsoft Office 2007, 2010, 2013, or năm nhâm thìn. Besides, if you lost Excel files, you can tải về theartinpixels.com data recovery software to lớn get additional help.

Bạn đang xem: Lỗi excel cannot open the file because the file format or file extension is not valid

About the Author

đánh giá & Awards

Best Data Recovery Software for 2021

3 Fixes for Excel Cannot Open the File Because the Extension Is Not Valid

The file 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 lớn open or edit an Excel tệp tin in Office 2003, 2007, 2010, 2013, 2016, 2019, & 365. The error message displays, "Excel cannot open the file because the extension is not valid".

This article will provide you with three effective sầu solutions to lớn resolve sầu excel cannot open 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 repair Excel files. 

Workable SolutionsStep-by-step Troubleshooting
Fix 1. Change File Extensionmở cửa Microsoft Excel và go to "File" > cliông xã Export và choose Change File Type...Full steps
Fix 2. Use Open and RepairStart Office Excel > cliông xã File and xuất hiện > select the inaccessible Excel file...Full steps
Fix 3. theartinpixels.com File Repair ToolLaunch theartinpixels.com Data Recovery Wizard, & then scan the corrupted or damaged Excel files...Full steps

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

Sometimes, when you try khổng lồ open or edit an Excel file on Microsoft Office 2003, 2007, 2010, 2013, 2016, 2019, or 365 you may encounter the following problem:

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


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

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

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


There are three useful solutions in total to lớn solve the Excel cannot open 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 to mở cửa It

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

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

Step 2. Clichồng "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 cliông chồng "Save sầu As". Then, Check if Excel can open your tệp tin or not.


Fix 2. Open Excel File Using the Open và Repair Feature

The "mở cửa and 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 tệp tin format or tệp tin extension is not valid.

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

Step 2. In the Open dialog box, click to lớn select the inaccessible Excel tệp tin.

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


Fix 3. Use theartinpixels.com File Repair Tool to lớn Fix Excel Cannot mở cửa the File

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

theartinpixels.com Data Recovery Wizard is an all-in-one tool that can help recover deleted files and restore corrupt files easily và efficiently. It can help to 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 theartinpixels.com 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, XPhường, 2000, 97, và 95 versionsReal-time previews of repairing corrupted Excel file

Now, tải về the theartinpixels.com MS Office document repair tool & follow the step-by-step guides below lớn repair damaged Excel files with three steps.

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

Launch theartinpixels.com Data Recovery Wizard, and then scan the corrupted or damaged Excel files.


Step 2. Scan for the corrupted Excel document

Find the damaged files through the filter, tệp tin path, tìm kiếm, etc.

Xem thêm: Lỗi Định Dạng Số Trong Excel 2010, Định Dạng Ngăn Cách Số Trong Excel


Step 3. Repair and save sầu the Excel tệp tin lớn a secure location

Double-click the corrupt excel file, & this program will automatically repair corrupted & damaged Excel files. Cliông chồng "Recover" to save the repaired Excel files lớn a safe location.


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

If your unsaved Excel tệp tin cannot be opened because the file format or tệp tin extension is not valid, how to 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 thất bại some changes you may have sầu made to lớn the document.

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


Step 2. mở cửa the "Previous Version" tab to các mục all the previously stored versions of the Excel tệp tin.

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


2. Restore Unsaved Excel File 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. xuất hiện Office Excel & go lớn the "File" tab > cliông chồng "Info".

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


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


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

Worthy Tips lớn Prevent Excel File from Loss

There are many ways to prsự kiện data loss. If you have sầu lost important Excel files due khổng lồ careless deletion, hard drive sầu formatting, or vi khuẩn attack, you can use the data recovery tool to lớn retrieve sầu lost data. There is another crucial point to avoid data loss, which is backing up your Excel file 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 sầu damaged/corrupted, or lost partition. On this occasion, you have to resort khổng lồ a professional tệp tin recovery tool for help. And theartinpixels.com file 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 sầu it a try lớn get your lost Excel baông xã immediately:

Step 1. Select location and cliông chồng "Scan"

Choose the drive X: or a specific thư mục on Desktop or somewhere else where you lost the excel files, and then cliông xã "Scan".


Step 2. Locate your excel files

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


Step 3. Previews and recover

You can double cliông xã on the Excel file to lớn pđánh giá its integrity. Finally, select the desired Excel files and click "Recover".


2. Back-Up Excel File Automatically 

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


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 tệp tin. With the help of the above sầu methods, this error can easily be resolved without data loss.

If Excel cannot open the file problem is due to tệp tin corruption, theartinpixels.com file repair tool can help you fix & 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 thẻ, or any other storage medium. No matter they are lost or existed on your devices. It"s worth a shot.

Excel Cannot xuất hiện The File Because the Extension Is Not Valid FAQs

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

How vì I fix the file format or file extension is not valid?

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

Step 1. Open 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. Clichồng "Save As". Then, check if the error "Excel cannot open the file" is resolved or not.

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

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

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

What does file extension not valid mean?

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

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