How to Write JSON to a Google Spreadsheet

Published in: Google Apps Script - Google Sheets

The WriteJSONtoSheet method take a JSON object and appends it as a new row in a Google Spreadsheet. It takes the keys of the JSON object, matches them with the header row of the spreadsheet and arranges the columns accordingly. If there’s no column corresponding to a key, it is automatically added. This is handy for logging operations and data objects in a Google Sheet for easy analysis.

// Written by Amit Agarwal

function writeJSONtoSheet(json) {

  var sheet = SpreadsheetApp.getActiveSheet();

  var keys = Object.keys(json).sort();
  var last = sheet.getLastColumn();
  var header = sheet.getRange(1, 1, 1, last).getValues()[0];
  var newCols = [];

  for (var k = 0; k < keys.length; k++) {
    if (header.indexOf(keys[k]) === -1) {

  if (newCols.length > 0) {
    sheet.insertColumnsAfter(last, newCols.length);
    sheet.getRange(1, last + 1, 1, newCols.length).setValues([newCols]);
    header = header.concat(newCols);

  var row = [];

  for (var h = 0; h < header.length; h++) {
    row.push(header[h] in json ? json[header[h]] : "");


Published in: Google Apps Script - Google Sheets

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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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