Excel Workbook & Sheet Password Protector
Excel Workbook & Sheet Password Protector
Protect Microsoft Excel (.xlsx) workbooks and individual worksheets with passwords. Lock formulas, prevent sheet deletion, and restrict cell editing.
🔒 100% In-Browser Protection: Password hashing and OpenXML protection tags are injected directly on your computer. Financial figures, formulas, and client records are never sent over the internet.
Select or Drag & Drop an Excel (.xlsx) File
Fast, secure local password protection
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About Excel OpenXML Protection
Microsoft Excel workbooks support standards-compliant protection hashes embedded into their underlying XML sheets (xl/worksheets/sheet*.xml) and workbook manifest (xl/workbook.xml). When applied, Excel prevents viewers from modifying confidential formulas, renaming tabs, inserting unwanted columns, or overriding locked financial assumptions without entering the authorized password.