loi excel cannot open the file

Excel Cannot Open The File Issue Overview

I have a excel.xlsx tệp tin saved in my system which has been corrupted .I atleast need to lớn recover the data stores .It is a tệp tin of 124 KB and has around 35 worksheets in the workbook .I have tried all possible ways to lớn recover and repair the tệp tin. from Microsoft Community

The tệp tin format of an Excel worksheet is .xlsx or .xls. Whenever the user opens any tệp tin, it is opened with the same extension. However, some users may encounter an error when opening or editing an Excel tệp tin in Office 2003, 2007, 2010, 2013, năm 2016, 2019, and 365. The error message displayed reads "Excel cannot open the tệp tin because the extension is not valid".

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Error - Excel can't open the tệp tin  because the extension is not valid

It usually indicates the tệp tin is not compatible with the Excel version of the tệp tin that has come corrupt or damaged.

This article will provide you with comprehensive solutions to lớn resolve the "Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid" error. You can change the tệp tin extension, use the Office repair utility, or use one of the tệp tin repair software to lớn repair corrupted Excel files. 

We have full solutions to lớn help you solve Excel cannot open the tệp tin because the extension is not valid issue in this post. In the beginning, you can watch a đoạn phim tutorial to lớn troubleshoot corrupted Word/Excel files. The key moments in this đoạn phim are as follows:

  • 00:14 Method 1. Insert to lớn a new Word document
  • 00:38 Method 2. Use open and repair
  • 00:55 Method 3. Default settings
  • 01:30 Method 4. EaseUS Fixo Document Repair

Here, we will show you all the possible solutions, and you can try these until your issue is fixed. Before you follow the solutions, kiểm tra if Excel is working normally.

Step 1. Press the Windows+R keys, type excel.exe /safe, and click "OK". Loading Excel without templates and 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, 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 lớn kiểm tra if the problem is fixed. If not, move on to lớn the fixes below. When your Excel is running slow, you can use this method to lớn quickly fix the issue by removing the add-ins.

check your excel application

Here are three useful solutions in total to lớn solve the Excel cannot open tệp tin problem. 

🔧Use the EaseUS File Repair Tool This method is suitable for users who encounter errors when trying to lớn open an Excel tệp tin due to lớn corruption or damage. It provides an automated and user-friendly solution to lớn repair the tệp tin and make it accessible again.
📛Change the Excel File Extension Sometimes, changing the Excel tệp tin extension can help resolve the issue. For example, it was renamed ".xlsx" to lớn ".xls" or vice versa. This method tricks Excel into recognizing the tệp tin as a valid format and allows it to lớn be opened.
✅Get Permission to lớn Access A lack of permissions may have caused the not valid error. You can add tệp tin permission for the unopened Excel tệp tin to lớn fix the issue.
⭐Use Open and Repair Feature This method is suitable for users who encounter issues with specific Excel files and want to lớn try repairing them using the native functionality of Excel.
📒Recover Unsaved Workbook This method can help you repair and restore the unsaved Excel files. When you cannot open Excel or close Excel files without saving changes, you can use this method.

Fix 1. Use the EaseUS File Repair Tool

If the "Excel cannot open the tệp tin because the extension is not valid" problem is caused by corrupt Excel files and not by tệp tin compatibility, you need a professional tệp tin repair program to lớn help you fix the problem. EaseUS Fixo Document Repair is an all-in-one tool that can help with corrupted tệp tin repair easily and efficiently. You can tải về this software now and get the trial version.

This handy tool can help resolve multiple tệp tin corruption issues. You can kiểm tra the following information to lớn learn more about EaseUS Fixo:

  • One of the best Excel repair tools that can help you repair damaged XLS and XLSX files quickly.
  • Also a good Word repair tool that solves Word won't open or open with blank pages.
  • Good at solving PDF issues such as opening 0kb PDF files, opening damaged PDF files, etc.

After downloading the EaseUS Fixo repair tool, follow the step-by-step guides below to lớn repair damaged Excel files in three steps:

Step 1. Double-click the EaseUS Fixo Document Repair to lớn launch it. Choose "File Repair" and add not open Excel files to lớn repair.

Step 2. After selecting all the Excel files needing repair, click "Repair All" to lớn start the repair process.

Step 3. You can preview the repaired Excel files and click "Save All" to lớn save them to lớn the mặc định thư mục.

repair damaged Excel files

EaseUS Fixo is easy to lớn use and safe. You can click the following sharing buttons to lớn let more readers know about Fixo!

Fix 2. Change the Excel File Extension to Fix Excel Cannot Open the File

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

Step 1. Open Microsoft Excel and go to lớn the "File" tab.

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

Step 3. Change the tệp tin extension to lớn any other tệp tin format that MS Excel supports and click "Save As" (Excel not saving changes? Quick tips are here). Then, Check whether Excel can open your tệp tin or not. 

Change tệp tin extendsion to lớn fix excel cannot open the tệp tin because the extension is not valid

Fix 3. Get Permission to lớn Access Excel Files

When you fail to lớn access Excel files, that may be because you are not the administrator of these files. That means you don't have permission to lớn read/write these files. We will show you how to lớn change the tệp tin permission in Windows OS:

Step 1. Go to lớn the target thư mục and find the Excel that the extension is not valid. Right-click the tệp tin and open the "Properties".

Step 2. Click the "Security" tab and choose "Edit".

click Security tab and choose Edit

Step 3. Select the trương mục you are using and click "Add". Then, a new window opens, and click "Advanced".

open Advanced settings window

Step 4. Click "Find Now", and you should click "Everyone" in the results. Then, click "OK".

find Everyone group

Step 5. Then, click "OK" again to lớn return the permission window. 

Step 6. Click the "Everyone" group and kiểm tra every allow box below. Click "OK" to lớn save the changes.

save changes

Fix 4. Open Excel File Using the Open and Repair Feature

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

Step 1. Start Office Excel. On the File menu 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, and then click "Open and Repair". Microsoft Office will then start to lớn kiểm tra the Excel document and repair problems or corruption it found. 

Fix 'Excel cannot open this file' error with Open and Repair feature.

You can also read the following passage to lớn open and repair Word documents:

open and repair word

10 Word Repair Fixes: How to lớn Open and Repair Corrupt Word 2016/2019

Do you know how to lớn troubleshoot a Word .doc or .docx tệp tin that will not open or unreadable issue? On this page, you will learn more. Read more >>

Fix 5. Use the Recover Unsaved Workbooks Option

If you are trying to lớn open an unsaved Excel workbook, and this not-valid error suddenly appears, you can try to lớn recover this unsaved Excel with Microsoft's built-in utility. This method is super simple but not that useful for everyone. Check the following tutorial to lớn learn more:

Step 1. Open Microsoft Excel in Windows and click "File".

click File in Excel

Step 2. Select the Info tab, and click "Manage Workbook" > "Recover Unsaved Workbooks". Then, you can recover any unsaved Excel files in the opening window.

recover unsaved workbook Excel

Several Windows users have proved the efficacy of these fixes. If one of the methods is helpful in resolving Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid issue, share it on Facebook, Twitter, Instagram, and other social truyền thông platforms!

Fix Excel Cannot Open the File Because the File Format or File Extension Is Not Valid on Mac [3 Fixes]

Some users have reported that they couldn't open Excel files on Mac. They also receive this error - Excel cannot open the tệp tin because the tệp tin format or extension is invalid. If you are faced with this error, you are unable to lớn view or edit your Excel tệp tin. Follow the solutions below, and you can troubleshoot the Office problems and recover the Excel files cannot be opened on Mac.

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Fix 1. Restart Excel on Mac

Step 1. Quit the Excel application: click "Excel > Quit Excel".

Step 2. Try to lớn open your Excel tệp tin on Mac again.

restart excel on mac

Fix 2. Restart Mac

Go to lớn the "Apple thực đơn > restart".

restart Mac

Fix 3. Change Excel File Format on Mac

Step 1. Click "File" from the thực đơn bar.

Step 2. In the "Export To" pop-out thực đơn, pick "Excel".

Step 3. To adjust the tệp tin format between XLSX and XLS, click "Advanced Options" and choose the one you want.

change tệp tin format on mac

How to lớn Recover Excel File When the File Format or File Extension Is Not Valid

If your unsaved Excel tệp tin cannot be opened because the tệp tin format or tệp tin extension is not valid, how would you recover excel tệp tin not saved?  In this case, try the two ways below. 

1. Restore Unsaved Excel Wordbook from Previous Versions

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

Step 1. Right-click the inaccessible Excel tệp tin and choose "Properties".

Open Excel properties

Step 2. Open the "Previous Version" tab to lớn list all the previously stored versions of the Excel tệp tin.

Step 3. Choose the most recent version and click "Restore" to lớn retrieve the spreadsheet.

recover unsaved excel from previous versions

2. Restore Unsaved Excel File Using AutoRecover

This method only works if you have turned on the AutoSave feature in Microsoft Excel. It can fix the not valid issue and recover your unsaved files. This feature is also helpful for recovering unsaved Word documents. 

Step 1. Open Office Excel and head into the "File" tab > click "Info".

Step 2. Besides Manage Versions, you'll see all autosaved versions of your tệp tin.

Restore cannot be opened Excel tệp tin from previous version.

Step 3. Open the tệp tin in Excel and click "Restore". 

Restore Excel tệp tin that cannot be opened

Step 4. Save the tệp tin with a new file name and phối the extension as .xlsx.

Important Tips: How to lớn Prevent Excel Files from Getting Loss

There are many ways to lớn prevent data loss. If you have lost important Excel files due to lớn accidental deletion, hard drive formatting, or virus attacks, you can use the EaseUS Data Recovery Wizard tool to lớn retrieve lost data. Another crucial point to lớn avoid data loss is backing up your Excel tệp tin on a regular basis.

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

In addition to restoring unsaved Excel caused by Excel crashes when saving or other reasons, many users may want to lớn recover lost Excel spreadsheets caused by accidental deletion, OS crash, hard drive damage/corruption, or lost partition. In these cases, you have to lớn resort to lớn a professional tệp tin recovery tool for help. And, EaseUS 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.

Give it a try to lớn get your lost Excel back immediately:

Step 1. Select location and click "Scan"

Choose the drive or a specific thư mục on Desktop or somewhere else where you lost the excel files, and click the "Scan" button.

select the location of the Excel files

Step 2. Locate your excel files

To quickly find the Excel files from the scan results, click the "Documents" option in the left panel. Choose "Excel", and click "Preview" to lớn kiểm tra if the Excel files are the wanted ones.

scan the lost excel files

Step 3. Recover Excel files

Finally, select the desired Excel files and click the "Recover" button. Then, select a thư mục to lớn save the Excel files to lớn another location.

recover Excel files

2. Back Up Excel File Automatically

If you modify and change your worksheet frequently, turning on the AutoSave feature is a good idea. Or, you can manually copy and backup your tệp tin to lớn another safe location in case of an accident.

Turn on AutoSave feature in Excel

Final Words

"Excel cannot open the tệp tin '(filename)' .xlsx because the tệp tin format for tệp tin extension is not valid" is a normal 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 tệp tin problem is due to lớn tệp tin corruption, the EaseUS Fixo Document Repair can help you fix and repair the Excel tệp tin with a few clicks pretty quickly. It is good at repairing photos, videos, documents, and other files on the hard drive, SD thẻ, memory thẻ, or any other storage medium. It's worth a shot.

Excel Cannot Open the File FAQs

The following four frequently asked questions are extremely relevant to lớn the "Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid" error. You can find the methods here if you also have any of these problems.

1. How tự you solve Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid?

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

Step 1. Open your Excel file. On the taskbar, select "File" and then choose "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, kiểm tra if the error "Excel cannot open the file" is resolved or not.

2. How tự I recover an Excel tệp tin format or tệp tin extension that is not valid?

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

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

3. What does tệp tin extension not valid mean?

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"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 a .xlsx tệp tin, especially when opening a spreadsheet received through an tin nhắn. 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.

4. Why can't I open an XLSX file?

When the Excel tệp tin is corrupted, not compatible with the Excel version, infected by the virus, or received by tin nhắn, these are the common causes of the "Excel cannot open the tệp tin because the tệp tin format or tệp tin extension is not valid" problem. If any of these problems appear, you can't open your XLSX tệp tin.