Use APKPure App
Get Export Contacts For WhatsApp old version APK for Android
Export Contact from Whatsapp to CSV file
With the free version you can export up to 500 WhatsApp contacts without any problem. When you finish exporting the contacts you can choose where to send the file. They can send it by email, WhatsApp, wherever you want!
The file you get is in comma separated format (.CSV). You can import this file to any platform or program, for example to Excel in any of its versions.
With the premium version you can export your WhatsApp contacts to CSV without any limits and it only costs 1.5USD.