{"id":27954,"date":"2025-06-30T16:01:25","date_gmt":"2025-06-30T14:01:25","guid":{"rendered":"https:\/\/tremhost.com\/blog\/?p=27954"},"modified":"2025-06-30T16:01:25","modified_gmt":"2025-06-30T14:01:25","slug":"lazy-loading-for-images-and-videos-what-it-is-and-how-to-implement-it","status":"publish","type":"post","link":"https:\/\/tremhost.com\/blog\/lazy-loading-for-images-and-videos-what-it-is-and-how-to-implement-it\/","title":{"rendered":"Lazy loading for images and videos: What it is and how to implement it."},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div><p>If you\u2019ve ever waited for a website to load, only to watch as dozens of images and videos slowly fill in, you know how frustrating slow load times can be. Fortunately, there\u2019s a smart solution called \u201clazy loading\u201d that can make your site feel much faster and more responsive.<\/p>\n<hr \/>\n<h3><strong>What Is Lazy Loading?<\/strong><\/h3>\n<p>Lazy loading is a technique where images and videos are only loaded when they\u2019re about to enter the user\u2019s viewport\u2014meaning, when the user is just about to scroll to them. Instead of loading every single media file on the page at once, the browser waits until each one is actually needed. This helps reduce initial load time, saves bandwidth, and can dramatically improve your website\u2019s performance, especially on pages with lots of media.<\/p>\n<p>Imagine a really long blog post with dozens of images. With lazy loading, visitors won\u2019t have to wait for every image (even those far below the fold) to load before they can start reading. Instead, images will load just in time as they scroll down.<\/p>\n<hr \/>\n<h3><strong>Why Should You Use Lazy Loading?<\/strong><\/h3>\n<ul>\n<li><strong>Faster initial page load<\/strong>: Only essential content loads at first, so your site feels snappier.<\/li>\n<li><strong>Reduced server and bandwidth usage<\/strong>: Visitors download only what they see.<\/li>\n<li><strong>Better user experience<\/strong>: Users can interact with your content sooner, with fewer delays.<\/li>\n<li><strong>Improved SEO<\/strong>: Faster sites are favored by search engines, and Google explicitly recommends lazy loading for large media.<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>How to Implement Lazy Loading<\/strong><\/h3>\n<h4><strong>1. Native Lazy Loading (The Easiest Way!)<\/strong><\/h4>\n<p>Modern browsers now support lazy loading out of the box. All you need to do is add a single attribute to your image or video tags:<\/p>\n<div class=\"MarkdownCodeBlock_container__nRn2j\">\n<div class=\"MarkdownCodeBlock_codeBlock__rvLec force-dark\">\n<div class=\"MarkdownCodeBlock_codeHeader__zWt_V\">\n<div class=\"MarkdownCodeBlock_languageName__4_BF8\">html<\/div>\n<div class=\"MarkdownCodeBlock_codeActions__wvgwQ\"><button class=\"button_root__TL8nv button_ghost__YsMI5 button_sm__hWzjK button_center__RsQ_o button_showIconOnly-compact-below___fiXt MarkdownCodeBlock_codeActionButton__xJBAg\" type=\"button\" data-theme=\"ghost\"><span class=\"button_label__mCaDf\">Copy<\/span><\/button><\/div>\n<\/div>\n<div class=\"\" data-collapsed=\"unknown\">\n<pre class=\"MarkdownCodeBlock_preTag__QMZEO MarkdownCodeBlock_horizontalOverflowHidden__YPHxg\"><code class=\"MarkdownCodeBlock_codeTag__5BV0Z\">&lt;img <span class=\"hljs-attr\">src<\/span>=\"image.jpg\" <span class=\"hljs-attr\">alt<\/span>=\"Description\" <span class=\"hljs-attr\">loading<\/span>=\"lazy\"&gt;\r\n&lt;iframe <span class=\"hljs-attr\">src<\/span>=\"video.html\" <span class=\"hljs-attr\">loading<\/span>=\"lazy\"&gt;&lt;\/iframe&gt;\r\n<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<p>That\u2019s it! The browser will handle the rest. This method is simple, requires no extra JavaScript, and works in most recent browsers.<\/p>\n<h4><strong>2. Using JavaScript Libraries<\/strong><\/h4>\n<p>For more control or support for older browsers, you can use a JavaScript library. Popular options include <a href=\"https:\/\/github.com\/aFarkas\/lazysizes\" target=\"_blank\" rel=\"noopener\">lazysizes<\/a> and <a href=\"https:\/\/apoorv.pro\/lozad.js\/\" target=\"_blank\" rel=\"noopener\">Lozad.js<\/a>.<\/p>\n<p>Example using Lazysizes:<\/p>\n<ol>\n<li><strong>Add the library:<\/strong>\n<div class=\"MarkdownCodeBlock_container__nRn2j\">\n<div class=\"MarkdownCodeBlock_codeBlock__rvLec force-dark\">\n<div class=\"MarkdownCodeBlock_codeHeader__zWt_V\">\n<div class=\"MarkdownCodeBlock_languageName__4_BF8\">html<\/div>\n<div class=\"MarkdownCodeBlock_codeActions__wvgwQ\"><button class=\"button_root__TL8nv button_ghost__YsMI5 button_sm__hWzjK button_center__RsQ_o button_showIconOnly-compact-below___fiXt MarkdownCodeBlock_codeActionButton__xJBAg\" type=\"button\" data-theme=\"ghost\"><span class=\"button_label__mCaDf\">Copy<\/span><\/button><\/div>\n<\/div>\n<div class=\"\" data-collapsed=\"unknown\">\n<pre class=\"MarkdownCodeBlock_preTag__QMZEO MarkdownCodeBlock_horizontalOverflowHidden__YPHxg\"><code class=\"MarkdownCodeBlock_codeTag__5BV0Z\">&lt;script <span class=\"hljs-attr\">src<\/span>=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/lazysizes\/5.3.2\/lazysizes.min.js\" <span class=\"hljs-attr\">async<\/span>&gt;&lt;\/script&gt;\r\n<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/li>\n<li><strong>Update your image tags:<\/strong>\n<div class=\"MarkdownCodeBlock_container__nRn2j\">\n<div class=\"MarkdownCodeBlock_codeBlock__rvLec force-dark\">\n<div class=\"MarkdownCodeBlock_codeHeader__zWt_V\">\n<div class=\"MarkdownCodeBlock_languageName__4_BF8\">html<\/div>\n<div class=\"MarkdownCodeBlock_codeActions__wvgwQ\"><button class=\"button_root__TL8nv button_ghost__YsMI5 button_sm__hWzjK button_center__RsQ_o button_showIconOnly-compact-below___fiXt MarkdownCodeBlock_codeActionButton__xJBAg\" type=\"button\" data-theme=\"ghost\"><span class=\"button_label__mCaDf\">Copy<\/span><\/button><\/div>\n<\/div>\n<div class=\"\" data-collapsed=\"unknown\">\n<pre class=\"MarkdownCodeBlock_preTag__QMZEO MarkdownCodeBlock_horizontalOverflowHidden__YPHxg\"><code class=\"MarkdownCodeBlock_codeTag__5BV0Z\">&lt;img <span class=\"hljs-attr\">data-src<\/span>=\"image.jpg\" <span class=\"hljs-attr\">class<\/span>=\"lazyload\" <span class=\"hljs-attr\">alt<\/span>=\"Description\"&gt;\r\n<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<p>The script automatically swaps <code>data-src<\/code> with <code>src<\/code> as the image comes into view.<\/li>\n<\/ol>\n<h4><strong>3. WordPress and Other CMS Plugins<\/strong><\/h4>\n<p>If you\u2019re using WordPress or another CMS, there are plugins that make this even easier. For example:<\/p>\n<ul>\n<li><strong>WordPress:<\/strong> Plugins like \u201cSmush,\u201d \u201ca3 Lazy Load,\u201d or even the built-in lazy loading (since WordPress 5.5+) can enable lazy loading with a single click.<\/li>\n<li><strong>Shopify, Wix, Squarespace:<\/strong> Check your platform\u2019s app store or settings for built-in lazy loading options or add-ons.<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>A Few Tips<\/strong><\/h3>\n<ul>\n<li><strong>Don\u2019t lazy load above-the-fold images.<\/strong> Critical images (like your site logo or hero banner) should load immediately for the best user experience.<\/li>\n<li><strong>Test your implementation.<\/strong> Tools like Google PageSpeed Insights can confirm if lazy loading is working and help you spot issues.<\/li>\n<li><strong>Watch for SEO.<\/strong> Make sure lazy-loaded images use proper <code>alt<\/code> attributes and that Google can still index them (with native lazy loading, this usually isn\u2019t a problem).<\/li>\n<\/ul>\n<hr \/>\n<p><strong>In Summary<\/strong><\/p>\n<p>Lazy loading is a quick win for almost any website, delivering faster loads, saving bandwidth, and keeping visitors happy. With just a small tweak to your code or a simple plugin, you can reap the benefits\u2014no complex setup required.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve ever waited for a website to load, only to watch as dozens of images and videos slowly fill in, you know how frustrating slow load times can be. Fortunately, there\u2019s a smart solution called \u201clazy loading\u201d that can make your site feel much faster and more responsive. What Is Lazy Loading? Lazy loading [&hellip;]<\/p>\n","protected":false},"author":226,"featured_media":27955,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[49],"tags":[],"class_list":{"0":"post-27954","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tips"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/27954","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/users\/226"}],"replies":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/comments?post=27954"}],"version-history":[{"count":1,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/27954\/revisions"}],"predecessor-version":[{"id":27956,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/posts\/27954\/revisions\/27956"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/media\/27955"}],"wp:attachment":[{"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/media?parent=27954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/categories?post=27954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tremhost.com\/blog\/wp-json\/wp\/v2\/tags?post=27954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}