imgzoom is a simple image zoomer. It will animate images to the maximum allowable size by the viewport, but will never make them larger than the image’s actual size.

This is a simple alternative to “lightbox” and such. This script has no external dependencies

Basic usage is as simple as:

<img src="http://example.com/image.jpg" style="width: 300px">


<img src="http://example.com/thumbnail.jpg" data-large="http://example.com/fullsize.jpg">

Then bind to the click event with e.g.

Array.prototype.slice.call(document.querySelectorAll('img')).forEach(function(img) {
	img.addEventListener('click', function(e) {

With jQuery it’s even easier:

$('img').on('click', function(e) {

For best results you probably want to add a wee bit of styling:

	img.imgzoom-loading {
		cursor: wait !important;

	.imgzoom-large {
		cursor: pointer;
		box-shadow: 0 0 8px rgba(0, 0, 0, .3);

		/* Simple animation */
		transition: all .4s;

This is a simplified version of bluerail/picture_zoomer, which I wrote a few years ago.

Copyright © 2010-2017 Martin Tournoij <martin@arp242.net>
This document is licensed under a cc-by 4.0 license.