First of all, I want to clarify that I don’t use such type of app if available on the internet. however, I can share with you my personal trick on how to get all contacts of a WhatsApp group.
First of you need to login on to your PC or Laptop in order to save all contacts of the WhatsApp group
scan QR code and connect your phone with Web WhatsApp
now go to your target group
After click on the Group icon, you can see the image which is given below now try to copy the numbers and paste them into notepad.
Now copy and paste these numbers into any other person’s conversation.
In this way, you can save them on your phone. Enjoy
Don’t forget to comment below if you think this is cool.