How to Convert XLSX to JSON in JavaScript

1 min readApr 13, 2021


Creating a web-based spreadsheet that can be accessed by multiple users can be a complicated and daunting task without the right tools. To simplify the process, you can create the spreadsheet in Excel and use the following API to convert it to JSON in JavaScript. The conversion will maintain your original formatting to ensure there is no loss of data or quality.

Now to begin, we will install the jQuery library:

bower install jquery

After the installation is complete, we can call the conversion function:

var form = new FormData();
form.append("inputFile", fileInput.files[0], "file");
var settings = {
"url": "",
"method": "POST",
"timeout": 0,
"headers": {
"Content-Type": "multipart/form-data",
"processData": false,
"mimeType": "multipart/form-data",
"contentType": false,
"data": form
$.ajax(settings).done(function (response) {

The end result will be your JSON object array! Visit the Cloudmersive website to retrieve your personal API key by registering for a free account; this will give you access to 800 calls/month across our library of APIs.




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