how to unprotect excel sheet

how to unprotect excel sheet

Unprotecting an Excel sheet can be necessary when you've forgotten the password or if you need to make changes to a protected worksheet. There are several methods you can use, depending on your access to the Excel file and your technical skills. Below, I will outline various methods to unprotect an Excel sheet, including using built-in features, VBA code, and online tools.

What are the steps to unprotect an Excel sheet without the password?

If you don't have the password to unprotect an Excel sheet, you can try the following methods:

1. Using the 'Unprotect Sheet' Feature with an Empty Password:

   • Sometimes, Excel sheets are protected with an empty password. Open the Excel file, go to the 'Review' tab, and click on 'Unprotect Sheet'. If no password is required, the sheet will be unprotected.

2. Using Excel's Built-in Feature:

   • For Excel 2010 and older versions, you can try this trick:

     • Open the Excel file.
     • Press Alt + F11 to open the VBA editor.
     • Double-click on the sheet you want to unprotect in the left panel.

     • Paste the following code in the code window and run it:

       Sub PasswordBreaker()
           Dim i As Integer, j As Integer, k As Integer
           Dim l As Integer, m As Integer, n As Integer
           Dim i1 As Integer, i2 As Integer, i3 As Integer
           Dim i4 As Integer, i5 As Integer, i6 As Integer
           On Error Resume Next
           For i = 65 To 66: For j = 65 To 66: For k = 65 To 66
           For l = 65 To 66: For m = 65 To 66: For i1 = 65 To 66
           For i2 = 65 To 66: For i3 = 65 To 66: For i4 = 65 To 66
           For i5 = 65 To 66: For i6 = 65 To 66: For n = 32 To 126
           ActiveSheet.Unprotect Chr(i) & Chr(j) & Chr(k) & _
               Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & Chr(i3) & _
               Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
           If ActiveSheet.ProtectContents = False Then
               MsgBox "One usable password is " & Chr(i) & Chr(j) & _
                   Chr(k) & Chr(l) & Chr(m) & Chr(i1) & Chr(i2) & _
                   Chr(i3) & Chr(i4) & Chr(i5) & Chr(i6) & Chr(n)
               Exit Sub
           End If
           Next: Next: Next: Next: Next: Next
           Next: Next: Next: Next: Next: Next
       End Sub

     • This code tries to unprotect the sheet using common password patterns.

3. Using a Third-Party Tool:

   • There are several software programs available online that can unprotect Excel sheets without the password. Programs like 'Excel Password Recovery' or 'iSunshare Excel Password Genius' can be used. Be cautious when using such tools and ensure they are from reputable sources to avoid malware.

Can I unprotect an Excel sheet using VBA code?

Yes, you can unprotect an Excel sheet using VBA code. Here’s how you can do it:

1. For Sheets Protected with a Known Password:

   • Open the Excel file.
   • Press Alt + F11 to open the VBA editor.
   • Insert a new module by clicking Insert > Module.

   • Paste the following code and modify the password:

     Sub UnprotectSheet()
         ActiveSheet.Unprotect Password:="yourpassword"
     End Sub

   • Run the macro by clicking Run > Run Sub/UserForm or press F5.

2. For Sheets Without a Known Password (Using the Method Described Above):

   • You can use the PasswordBreaker code provided in the previous section to attempt to crack the password.

Is there a way to unprotect an Excel sheet online?

Yes, there are online services that can help you unprotect an Excel sheet. Here are a few methods:

1. Using Online Tools:

   • Websites like LostMyPass.com or Password-Find.com offer services to unprotect Excel sheets. You upload your Excel file to their server, and they return an unprotected version.

   • Steps:

     • Go to the website.
     • Upload your Excel file.
     • Follow the instructions provided by the website to receive the unprotected file.
   • Be cautious with online services, as uploading sensitive data can pose a security risk.

2. Using Browser-Based Applications:

   • Some online Excel editors, such as Google Sheets, can sometimes open and edit protected Excel files. While they may not remove the protection, they can allow you to work around it.

   • Steps:

     • Open Google Sheets.
     • Upload your Excel file.
     • Try to edit the file. If successful, you can download the file without protection.

Always ensure you use reputable services and be aware of the potential security risks when uploading sensitive data online.

The above is the detailed content of how to unprotect excel sheet. For more information, please follow other related articles on the PHP Chinese website!