Preview Image from File Upload using JavaScript

Try it out now:



Step 1: Add a input type=”file”, give it an id and add the attribute multiple to allow for multiple file upload

<input type="file" id="files" name="files" multiple >

Step 2: On Page load, add an event listener for your input file upload change event


window.onload = function() {

var inputLocalFont = document.getElementById("files");

inputLocalFont.addEventListener("change", previewImages, false);



Step 3: Create a previewImages() function to be called when the change event is fired


//Preview new images to upload

function previewImages() {

var fileList = this.files;

var previewImages = document.getElementById("previewImages");

var anyWindow = window.URL || window.webkitURL;

previewImages.innerHTML = “”;

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

var objectUrl = anyWindow.createObjectURL(fileList[i]);

var filenameExt = fileList[i].name.split(‘.png’);

var filename = filenameExt[0];

var holder = ‘<div style=”float:left;”>’ +

‘ <img alt=”” src=”‘ + objectUrl + ‘” width=”100px” height=”100px” style=”margin: 15px;” />’ +


previewImages.innerHTML += holder;



//This will be used to set the hight of the parent div

previewImages.innerHTML += “<div style=’width: 100%; clear: both; float: none’></div>”;


Enjoy 🙂