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EXCEL-UNREADABLE-CONTENT

Excel Excel Found Unreadable Content Applies to: Windows 7, Windows 10, Windows 11

What it means

Excel detected some form of corruption in the file when opening it.

Also seen as: Excel found unreadable content in [filename]

Quick fix steps

  1. Click "Yes" on the prompt to let Excel attempt its own repair — this succeeds more often than expected.
  2. If that fails, use File > Open > select the file > dropdown next to Open > "Open and Repair."
  3. Check File > Info > Manage Workbook for an AutoRecover version saved before the corruption occurred.
For the full step-by-step walkthrough, see Excel File Is Corrupted or Unreadable.

Frequently Asked Questions

Does "unreadable content" mean the file is permanently damaged?
Not necessarily — Excel's repair process succeeds in recovering at least partial content in a real share of cases, so it's worth trying the repair prompt before assuming total data loss.
Should I try opening the file in a different program instead?
It's worth trying as a diagnostic step (like Google Sheets or LibreOffice Calc), since a file that's unreadable to Excel specifically sometimes still opens elsewhere, though results vary depending on the type of corruption.

Other error codes

#REF! — #REF! Error

A formula is pointing to a cell that no longer exists — usually because a row, column, or sheet it referenced was deleted.

#VALUE! — #VALUE! Error

The formula received the wrong type of data — commonly text where it expected a number.

#DIV/0! — #DIV/0! Error

The formula is dividing by zero or by an empty cell.

#N/A — #N/A Error

A lookup formula (VLOOKUP, MATCH, XLOOKUP, INDEX/MATCH) couldn't find a matching value.