A small episode occurred when processing an excel form today. It may be due to security considerations. The form was added with a password, and the following prompt appeared:
But what should I do if I don’t know the password?
Later, after inquiring Baidu, I found a good way to crack, but in the process, I made a detour. Record it here, hoping to help those in need.
1. First of all, check whether the suffix of your form is xls or xlsx. Note that although these two suffixes seem to be the same in our daily use, they have a great influence when cracking the encryption.
If your file suffix is xls, then click Save As and choose xlsx as the file format. What to do in this step will be explained in detail later (very important)
2. Rename the file with the suffix of xlsx and change the suffix to a compressed file with rar. Here, you can change the suffix directly without performing compression operations.
3. Directly double-click to open the compressed file and find the following folder.
4. Double-click to open the above folder, pay attention, if you do not save as a suffix of xlsx, the next step is very easy to make mistakes, and you can't even find the above folder.
5. Open this folder, find the encrypted file, then right-click and select Edit (F4).
6. An open text will appear, as shown in the figure below. Search and find "protect". After you find the label, you can see the password inside. You can remember the password or delete the label directly. Many people may not Know the concept of the label, which is <............/>, this is a complete label, the content inside is replaced with .... Be careful not to delete too much, it is likely to cause files damage.
7. Save the file after making the change, and you will be prompted to update the file just now. Just click OK. After finishing this, you can directly change the suffix to xlsx to open it for editing.
8. I need to be reminded that this method is only to crack the password of the form, and some files are also added with a password. This method cannot solve the problem. If the method I said does not solve your problem, there are some other methods for reference.
https://blog.csdn.net/jnxxhzz/article/details/81673107 Try more according to your own situation.