You may have sensitive data in your Excel sheet and want to keep the file secure. You can protect it with a password in just a few simple steps.
Method : 1
Click File and Save As the file.
2. Click General Options.
Click General Options. Before saving, go to Tools > General Options. Password to Open: ****** — Keep this password to protect the file. Password to Modify: ****** — Optional; use this if you do not want to allow others to modify the file.
3. Save the file.
Click ok and save the file.
Method : 2
Click File and info
2. Click Protect Workbook.
Click Protect Workbook → Encrypt with Password. Enter a password and click OK.
This will set a password for the file, which will be required when opening it.
Remove Password:
To remove the password, follow Method 2: go to Info → Protect Workbook → Encrypt with Password. Remove the password and leave the field blank.