A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
You can often remove an Excel sheet protection (not the “open file” password) by treating the .xlsx file as a ZIP archive and deleting the protection entry from the sheet XML as modern .xlsx files are ZIP archives of XML files.
Steps to unlock Excel worksheet protection:
- Rename MyWorkbook.xlsx → MyWorkbook.zip (or just open it with 7-Zip / WinRAR / Archive Utility).
- Open the ZIP and navigate to xl/worksheets/.
- Extract the relevant sheet file(s) — e.g. sheet1.xml (or open directly in 7-Zip and Edit if supported).
- Open sheet1.xml in a plain text editor (Notepad, Notepad++, VS Code, TextEdit in plain text mode).
- Find the <sheetProtection .../> element.
- Delete the entire <sheetProtection .../> element (or remove the attributes that define password).
- Save the edited sheet1.xml.
- Put the edited file back into the ZIP (replace the original). If you used a rename to .zip, change it back to .xlsx.
- Open the .xlsx in Excel — the sheet should be unprotected.