Create Nested Labels in Gmail with Apps Script

Published in: Gmail - Google Apps Script

You can create nested labels in Gmail with the help Google Apps Script using the createLabel method of the GmailApp service. The important thing to note is that the parent label should exist before a child label is created.

You can specify the label hierarchy in this format - Parent/Child/Grandchild/GreatGrandChild. Also avoid using dashes - in the name as they are seen as label separators in Gmail.

function createNestedGmailLabel() {

  var name   = "Parent Label/Child Label/Grandchild Label";
  var labels = name.split("/");
  var gmail, label = "";

  for (var i=0; i<labels.length; i++) {

    if (labels[i] !== "") {
      label = label + ((i===0) ? "" : "/") + labels[i];
      gmail = GmailApp.getUserLabelByName(label) ?
                  GmailApp.getUserLabelByName(label) : GmailApp.createLabel(label);

  return gmail;

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Published in: Gmail - Google Apps Script

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Web Geek, Google Developer Expert
Amit Agarwal

Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India. He is the developer of Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory

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