Google Apps Script: How to remove empty Gmail labels?

Question

With Google Apps Script, is it possible to remove empty (unused) Gmail labels?

Answer 1

Certainly, first use GmailApp.getUserLabels() to retrieve all the labels, then loop over them and use getThreads() to determine if a given label is empty, and finally use deleteLabel() to remove empty ones.

See:

https://developers.google.com/apps-script/reference/gmail/gmail-app

https://developers.google.com/apps-script/reference/gmail/gmail-label