How to Fix Excel for iPad File Format or Extension Errors
Question details
Users need to recover a corrupted Excel workbook that triggers a file format or extension error on PC/Mac after being edited and saved on an iPad.
- Product
- Microsoft Excel
- Device & OS
- iPadOS
- Scenario
- Attempting to open an Excel spreadsheet on a different device after editing it in the iPad Excel app.
- Observed behavior
- The Excel file shrinks significantly in size, becomes corrupted, and displays an error stating the file format or file extension is invalid.
Immediately stop editing the corrupted file and do not overwrite the original document, as saving new changes could permanently erase your recoverable version history.
Restore a Previous Version from Cloud Storage
If your workbook was stored in OneDrive or iCloud, use the built-in version history feature to restore the file to a state before the iPad edits corrupted it.
Cloud storage services automatically retain older versions of your files each time you save. Accessing these platforms from a web browser allows you to bypass device bugs and roll back the corrupted Excel file to its original, intact state.
Log into your OneDrive account via a web browser, locate the corrupted Excel file, right-click the file, and select 'Version history'.
Review the list of saved versions, identify the one saved right before the iPad edits were made, and click 'Restore' to recover the file.
If you use iCloud, open iCloud.com, navigate to iCloud Drive, select your workbook, click the 'More' options icon, and choose 'Browse Previous Versions' to restore an older copy.
Recover from Local Temporary Copies or AutoRecover
Check for local AutoRecover files on the device where the document was originally created or previously edited before moving to the iPad.
Contact Microsoft Support for Escalation
Since file shrinking and corruption is a known Microsoft bug on iPad, escalating to support can help investigate the damaged file.
Edit Spreadsheets Safely on iPad with WPS Office
Avoid file corruption bugs and data loss when editing spreadsheets on your iPad. WPS Office is a lightweight, reliable, and free alternative that ensures your workbooks remain stable and intact across all devices.
- 1. Download WPS Office: Search for WPS Office in the App Store on your iPad and install the free application.
- 2. Open Your Workbooks: Launch WPS Office and directly open your existing .xlsx or .xls files from local storage or your preferred cloud service.
- 3. Edit and Save Securely: Make your edits using advanced spreadsheet tools and save your progress safely without fear of formatting corruption.
Frequently Asked Questions
Why did my Excel file size shrink significantly after editing on my iPad?
This is caused by a known parsing issue in certain versions of the Microsoft Excel app for iPad. The application mistakenly strips out essential underlying XML formatting data when saving, which drastically reduces the file size and corrupts the file structure.
Will changing the file extension fix the Excel file format error?
Usually, no. If the file was corrupted and shrunk by the iPad saving bug, the internal data is physically missing. Simply renaming the extension from .xlsx to .xls or .zip will not restore the missing structure. You must recover a previous version of the file instead.
Can I recover the corrupt file if I don't use OneDrive or iCloud?
If the file was saved locally on the iPad without any cloud backup, recovery is extremely difficult. You can check the 'Files' app on your iPad to see if any temporary copies or 'Recently Deleted' versions exist, or check your last full device backup via iTunes or Finder.
