Step 1: You should have Google Chrome installed on your tablet. I will share my miPad screens. I think all Android tablets work similarly but if not please try to find the required settings yourself or comment below.
Step 2: Open https://web.whatsapp.com/ on your Chrome browser. And if you see the below screen then its a mobile website. You need to request for desktop site.
Step 3: Go to setting and request for ‘Desktop site’ as shown in the below image.
Step 4: If you are being directed to mobile/tablet site again and again then just go to settings and delete cookies/history for whatsapp.com. It will reset all your browsing history for this website. Then again try opening web.whatsapp.com on your tablet.
To delete site cookies go to Setting >> Site settings >> All sites >> Search for Whatsapp >> Click on the search result (which will be some whatsapp.com) >> Clear & Reset
Step 5: Now the above link should work perfectly and you can login to Whatsapp just by scanning the QR code. This is exactly what we do for desktop version.
Step 6: Here we go. Enjoy chatting on your big screen. Please like and comment if you liked my article.