How To Cancel All Pending Friends Requests at Once on Facebook

buka chrome Just go to Facebook.com, Login with your details.

Now go to,
https://m.facebook.com/friends/center/requests/outgoing/#friends_center_main
It will display all your pending sent requests.
Open "Inspect" by Right click on the same page. 

Now Go to "console" in top tabs and hit below script.

var inputs = document.getElementsByClassName('_54k8 _56bs _56bt');
 for(var i=0; i<inputs.length;i++) {
 inputs[i].click();
 }

That's all, all your requests open on that page will be deleted.