{"id":740,"date":"2026-08-28T10:00:00","date_gmt":"2026-08-28T04:30:00","guid":{"rendered":"https:\/\/imageoptimizerpro.ai\/blog\/?p=740"},"modified":"2026-08-27T16:19:06","modified_gmt":"2026-08-27T10:49:06","slug":"images-still-fail-pagespeed-insights-after-compression","status":"publish","type":"post","link":"https:\/\/imageoptimizerpro.ai\/blog\/images-still-fail-pagespeed-insights-after-compression\/","title":{"rendered":"Why Your Images Still Fail Google PageSpeed Insights After Compression"},"content":{"rendered":"\n<script data-wp-block-html=\"js\">\ndocument.addEventListener('DOMContentLoaded', function () {\n    document.querySelectorAll('.copy-btn').forEach(function(button) {\n\n        button.addEventListener('click', function() {\n            const code = this.nextElementSibling.querySelector('code').textContent;\n\n            navigator.clipboard.writeText(code);\n\n            this.textContent = 'Copied!';\n\n            setTimeout(() => {\n                this.textContent = 'Copy';\n            }, 2000);\n        });\n\n    });\n});\n<\/script>\n\n<div class=\"tldr-box\">\n    <p><strong>TL;DR:<\/strong> If your images still fail PageSpeed Insights after compression, compression is only solving one part of the problem. Google may still flag images that are oversized, delivered in the wrong format, loaded too late, missing responsive sizing, or competing with other resources. The fix is to optimize <strong>the entire image delivery path<\/strong>, not just reduce file size.<\/p>\n<\/div>\n\n<p>You compressed your images, <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/how-to-reduce-image-file-size\/\">reduced their file sizes<\/a>, and expected the PageSpeed Insights score to improve. Then you ran the test again, and the same image warnings were still there. This is a common situation.<\/p>\n<p>The reason is simple: <strong>image compression and PageSpeed Insights image optimization are not the same thing<\/strong>. Compression reduces the bytes inside an image. PageSpeed Insights can also evaluate whether the browser is receiving the <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/best-image-size-for-website\/\">right image dimensions<\/a>, format, loading priority, and resource at the right time.<\/p>\n<p>So if PageSpeed Insights still reports image-related issues after compression, don&#8217;t immediately compress them again. First, identify <i>which image problem Google is actually reporting<\/i>.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Quick_Answer_Why_Do_Compressed_Images_Still_Fail_PageSpeed_Insights\"><\/span>Quick Answer: Why Do Compressed Images Still Fail PageSpeed Insights?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Compressed images can still trigger PageSpeed Insights issues when they are oversized, served in inefficient formats, not delivered responsively, loaded too late, or delivered inefficiently. Compression reduces file size, but it does not fix these other image performance issues.<\/p>\n\n<table style=\"font-family: Poppins, sans-serif; color: #000; width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd; font-size:14px;\">\n    <thead>\n        <tr style=\"background:#ffeefa;\">\n            <th style=\"padding:12px; border:1px solid #ddd;\">Image performance issue<\/th>\n            <th style=\"padding:12px; border:1px solid #ddd;\">Why compression may not fix it<\/th>\n            <th style=\"padding:12px; border:1px solid #ddd;\">What to do<\/th>\n        <\/tr>\n    <\/thead>\n    <tbody>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Properly sized images<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">The file is still larger than its displayed dimensions<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Resize and serve responsive versions<\/td>\n        <\/tr>\n        <tr style=\"background:#f9fafb;\">\n            <td style=\"padding:12px; border:1px solid #ddd;\">Inefficient image formats<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">JPEG or PNG may still be heavier<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Use WebP or AVIF where appropriate<\/td>\n        <\/tr>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Poor responsive delivery<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Mobile may receive desktop-sized assets<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Use srcset and sizes<\/td>\n        <\/tr>\n        <tr style=\"background:#f9fafb;\">\n            <td style=\"padding:12px; border:1px solid #ddd;\">Slow LCP image<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">The critical image is discovered or loaded too late<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Prioritize the LCP image<\/td>\n        <\/tr>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Inefficient image delivery<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Caching or delivery adds delay<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Improve caching and CDN delivery<\/td>\n        <\/tr>\n        <tr style=\"background:#f9fafb;\">\n            <td style=\"padding:12px; border:1px solid #ddd;\">Too many images load initially<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Compression doesn&#8217;t reduce image requests<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Lazy-load non-critical images<\/td>\n        <\/tr>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Missing image dimensions<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Layout space isn&#8217;t reserved<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Add width and height<\/td>\n        <\/tr>\n    <\/tbody>\n<\/table>\n\n<h2><span class=\"ez-toc-section\" id=\"Why_Compression_Alone_Doesnt_Fix_PageSpeed_Insights_Image_Issues\"><\/span>Why Compression Alone Doesn&#8217;t Fix PageSpeed Insights Image Issues<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Google&#8217;s guidance makes it clear that image optimization goes beyond compression. Factors such as <a href=\"https:\/\/developer.chrome.com\/docs\/performance\/insights\/image-delivery\" target=\"_blank\" rel=\"noopener\"><strong>image format, quality, resolution, responsive sizing, and delivery<\/strong> can all affect image performance<\/a>. Images also often account for a significant share of a page&#8217;s downloaded bytes, making them an important performance optimization target.<\/p>\n<p>Think of an image as having several performance layers:<\/p>\n<p><strong>File size \u2192 dimensions \u2192 format \u2192 responsive selection \u2192 loading priority \u2192 delivery \u2192 rendering<\/strong><\/p>\n<p style=\"margin-bottom: 0;\">Compression mainly addresses the first layer. For example, imagine a product image that is:<\/p>\n<ul>\n    <li>2,400 \u00d7 2,400 pixels<\/li>\n    <li>280 KB after compression<\/li>\n    <li>displayed at 400 \u00d7 400 pixels on mobile<\/li>\n<\/ul>\n<p>The 280 KB file may be reasonably compressed, but the browser is still downloading more image data and pixels than are needed for the displayed size. That is why <strong>compressed images still fail PageSpeed Insights<\/strong>.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"7_Reasons_Images_Still_Fail_PageSpeed_Insights_After_Compression\"><\/span>7 Reasons Images Still Fail PageSpeed Insights After Compression<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Compression is only one part of PageSpeed Insights image optimization. Your images can still trigger warnings because of their dimensions, format, loading priority, delivery method, or how they are served across devices. The sections below break down the most common reasons images fail PageSpeed Insights even after compression, and what to fix for each one.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"1_Your_Images_Are_Compressed_but_Still_Oversized\"><\/span>1. Your Images Are Compressed but Still Oversized<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>One of the most common reasons <strong>images fail PageSpeed Insights<\/strong> is that their dimensions are much larger than their displayed size.<\/p>\n<p>For example, a product card may display an image at 300 \u00d7 300 pixels while the browser downloads a 1600 \u00d7 1600 version. Even after compression, you&#8217;re still sending more pixels than the page needs.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Resize images to match their actual display size and serve responsive versions with <code>srcset<\/code> and <code>sizes<\/code>.<\/p>\n\n<div style=\"position:relative;margin:20px 0;\">\n    <button class=\"copy-btn\" style=\"position: absolute; top: 10px; right: 10px; background: #fff; border: none; padding: 4px 12px; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer; box-shadow: unset;\">\n        Copy\n    <\/button>\n<pre><code class=\"language-html\">&lt;img\n  src=\"product-800.jpg\"\n  srcset=\"\n    product-400.jpg 400w,\n    product-800.jpg 800w,\n    product-1200.jpg 1200w\"\n  sizes=\"(max-width: 600px) 100vw, 50vw\"\n  width=\"800\"\n  height=\"800\"\n  alt=\"Blue running shoes\"&gt;<\/code><\/pre>\n<\/div>\n\n<p>This helps the browser choose a more appropriate image instead of downloading an oversized asset.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"2_The_Image_Format_Is_Still_Inefficient\"><\/span>2. The Image Format Is Still Inefficient<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Compression does not automatically make an image format efficient. A compressed JPEG or PNG can still be larger than an equivalent <strong>WebP or AVIF<\/strong> image.<\/p>\n<p>For many photographic and ecommerce images, modern formats can provide a better balance between quality and file size.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-2\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Test <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/webp-vs-avif\/\">WebP and AVIF<\/a> against the original format and use the option that provides the best quality-to-size ratio for the image.<\/p>\n\n<table style=\"font-family: Poppins, sans-serif; color: #000; width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd; font-size:14px; margin-top:10px;\">\n    <thead>\n        <tr style=\"background:#ffeefa;\">\n            <th style=\"padding:12px; border:1px solid #ddd;\">Format<\/th>\n            <th style=\"padding:12px; border:1px solid #ddd;\">Best suited for<\/th>\n            <th style=\"padding:12px; border:1px solid #ddd;\">Key consideration<\/th>\n        <\/tr>\n    <\/thead>\n    <tbody>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">JPEG<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Photos<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Widely supported but can be larger<\/td>\n        <\/tr>\n        <tr style=\"background:#f9fafb;\">\n            <td style=\"padding:12px; border:1px solid #ddd;\">PNG<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Graphics and transparency<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Often inefficient for photos<\/td>\n        <\/tr>\n        <tr>\n            <td style=\"padding:12px; border:1px solid #ddd;\">WebP<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Photos and ecommerce images<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Good general-purpose option<\/td>\n        <\/tr>\n        <tr style=\"background:#f9fafb;\">\n            <td style=\"padding:12px; border:1px solid #ddd;\">AVIF<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">High-quality photographs<\/td>\n            <td style=\"padding:12px; border:1px solid #ddd;\">Often offers excellent compression<\/td>\n        <\/tr>\n    <\/tbody>\n<\/table>\n\n<h3><span class=\"ez-toc-section\" id=\"3_Youre_Sending_the_Same_Image_to_Every_Device\"><\/span>3. You&#8217;re Sending the Same Image to Every Device<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A large product image may look appropriate on desktop but be unnecessarily heavy for mobile. Simply shrinking the image with CSS doesn&#8217;t change the file the browser downloads.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-3\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Use <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/responsive-images-vs-lazy-loading\/\"><strong>responsive image optimization<\/strong><\/a> with <code>srcset<\/code> and <code>sizes<\/code> so mobile devices can receive smaller assets while larger screens receive larger versions.<\/p>\n<p>This is especially important for stores with hundreds of product images, where oversized mobile assets can quickly increase page weight.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"4_Your_LCP_Image_Is_Loading_Too_Late\"><\/span>4. Your LCP Image Is Loading Too Late<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sometimes an image is properly compressed and sized but still hurts performance because the browser discovers or loads it too late.<\/p>\n<p>This matters most when the image is the <strong>Largest Contentful Paint (LCP)<\/strong> element, such as a hero image or featured product image.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-4\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/imageoptimizerpro.ai\/blog\/preloading-vs-lazy-loading-images\/\"><strong>Prioritize the LCP image instead of lazy-loading it<\/strong><\/a>. You can use <code>fetchpriority=\"high\"<\/code> when appropriate and make the image easy for the browser to discover.<\/p>\n\n<div style=\"position:relative;margin:20px 0;\">\n    <button class=\"copy-btn\" style=\"position: absolute; top: 10px; right: 10px; background: #fff; border: none; padding: 4px 12px; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer; box-shadow: unset;\">\n        Copy\n    <\/button>\n<pre><code class=\"language-html\">&lt;img\n  src=\"hero.webp\"\n  width=\"1200\"\n  height=\"600\"\n  fetchpriority=\"high\"\n  alt=\"Summer collection\"&gt;<\/code><\/pre>\n<\/div>\n\n<p>Note: Don&#8217;t automatically apply <code>loading=\"lazy\"<\/code> to above-the-fold images.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"5_Your_Images_Are_Delivered_Too_Slowly\"><\/span>5. Your Images Are Delivered Too Slowly<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A small image can still load slowly if it is delivered inefficiently. Slow servers, poor caching, distant infrastructure, or inefficient image delivery can add unnecessary waiting time even when the file itself is well compressed.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-5\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Improve image delivery with effective caching, CDN delivery, and image-aware transformations where appropriate.<\/p>\n<p>An <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/what-is-an-image-cdn\/\">image CDN<\/a> can also help deliver optimized image variants closer to visitors and, when configured for image transformation, adapt assets to different devices.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"6_Too_Many_Images_Are_Loading_at_Once\"><\/span>6. Too Many Images Are Loading at Once<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Compression reduces the size of individual images, but it doesn&#8217;t reduce the number of images being downloaded.<\/p>\n<p>For example, a category page with 40 product images can still create significant network competition if all 40 load immediately.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-6\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><a href=\"https:\/\/imageoptimizerpro.ai\/blog\/lazy-loading-images-ecommerce\/\">Lazy-load<\/a> non-critical, below-the-fold images<\/strong> while allowing important above-the-fold images to load normally. This makes image loading optimization about when images load, not just how large they are.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"7_Your_Image_Dimensions_Arent_Defined_Properly\"><\/span>7. Your Image Dimensions Aren&#8217;t Defined Properly<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Image compression alone won&#8217;t prevent layout shifts. If the browser doesn&#8217;t know an image&#8217;s dimensions before it loads, it may have to adjust the layout when the image appears, potentially affecting <strong>Cumulative Layout Shift (CLS)<\/strong>.<\/p>\n\n<h4><span class=\"ez-toc-section\" id=\"What_to_fix-7\"><\/span>What to fix<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong>Add accurate <code>width<\/code> and <code>height<\/code> attributes<\/strong> to images so the browser can reserve the correct space before the resource loads.<\/p>\n<div style=\"position:relative;margin:20px 0;\">\n    <button class=\"copy-btn\" style=\"position: absolute; top: 10px; right: 10px; background: #fff; border: none; padding: 4px 12px; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer; box-shadow: unset;\">\n        Copy\n    <\/button>\n<pre><code class=\"language-html\">&lt;img\n  src=\"product.webp\"\n  width=\"600\"\n  height=\"600\"\n  alt=\"Black leather handbag\"&gt;<\/code><\/pre>\n<\/div>\n\n<p>This is particularly useful for product grids, recommendation sections, and other image-heavy layouts.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"A_Practical_Way_to_Diagnose_Images_That_Fail_PageSpeed_Insights\"><\/span>A Practical Way to Diagnose Images That Fail PageSpeed Insights<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When <strong>PageSpeed Insights image warnings<\/strong> remain after compression, don&#8217;t repeatedly lower image quality. Instead, work through the audit in this order:<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Step_1_Identify_the_exact_audit\"><\/span>Step 1: Identify the exact audit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Look for recommendations such as:<\/p>\n<ul>\n    <li>Properly size images<\/li>\n    <li>Serve images in next-gen formats<\/li>\n    <li>Improve image delivery<\/li>\n    <li>Preload key requests<\/li>\n    <li>Largest Contentful Paint<\/li>\n    <li>Defer offscreen images<\/li>\n<\/ul>\n<p>Each recommendation points toward a different problem.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Step_2_Check_the_actual_rendered_size\"><\/span>Step 2: Check the actual rendered size<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Compare the image&#8217;s intrinsic dimensions with the dimensions at which it appears on the page.<\/p>\n<p>If a 1600-pixel image is displayed at 400 pixels, resizing or responsive delivery is likely more useful than additional compression.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Step_3_Check_what_the_browser_actually_downloads\"><\/span>Step 3: Check what the browser actually downloads<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Don&#8217;t rely only on the image filename.<\/p>\n<p>Open Chrome DevTools \u2192 <strong>Network<\/strong> \u2192 <strong>Img<\/strong> and inspect the requested file, transfer size, dimensions, and timing.<\/p>\n<p> This can reveal a common problem: you optimized the original file, but the website&#8217;s CMS, theme, app, or CDN is still serving a different version.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Step_4_Check_the_LCP_image_separately\"><\/span>Step 4: Check the LCP image separately<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If the problematic image is above the fold, don&#8217;t automatically lazy-load it. Check when the browser discovers it and when the request begins. Late discovery can be a bigger issue than another 20 KB of compression.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Step_5_Test_mobile_separately\"><\/span>Step 5: Test mobile separately<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>PageSpeed Insights can expose problems that are more visible under mobile conditions. <\/p>\n<p>Check whether mobile visitors are receiving unnecessarily large product images, desktop hero images, or excessive image requests.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"A_Simple_Image_Optimization_Workflow_That_Actually_Works\"><\/span>A Simple Image Optimization Workflow That Actually Works<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"margin-bottom: 0;\">For most websites, particularly ecommerce sites, a reliable workflow looks like this:<\/p>\n<p><strong>Resize \u2192 choose format \u2192 compress \u2192 create responsive variants \u2192 prioritize critical images \u2192 lazy-load non-critical images \u2192 optimize delivery \u2192 test again<\/strong><\/p>\n<p>Each step solves a different problem. For example, consider a 1,500 \u00d7 1,500 product image:<\/p>\n<ul>\n    <li><strong>Before:<\/strong> <br> 1,500 \u00d7 1,500 JPEG \u2192 450 KB \u2192 displayed at 400 \u00d7 400<\/li>\n    <li><strong>After:<\/strong><br> 400\u2013800 pixel responsive WebP\/AVIF candidate \u2192 appropriately compressed \u2192 selected with srcset \u2192 loaded according to viewport priority<\/li>\n<\/ul>\n<p>The second setup isn&#8217;t merely a smaller file. It is a better <strong>image delivery strategy<\/strong>. For larger ecommerce catalogs, <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/compress-images-in-bulk\/\">bulk image compression<\/a> can be helpful in scaling this problem.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Why_PageSpeed_Insights_Can_Still_Show_Image_Warnings_After_You_Optimize_Them\"><\/span>Why PageSpeed Insights Can Still Show Image Warnings After You Optimize Them<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There is another detail that often confuses: <strong>PageSpeed Insights is measuring the page it can access, not necessarily the files sitting in your image library<\/strong>.<\/p>\n<p style=\"margin-bottom: 0;\">You may have optimized an original image, but the live page could still be:<\/p>\n<ul>\n    <li>Requesting an older image URL<\/li>\n    <li>Generating a larger thumbnail<\/li>\n    <li>Serving a different format<\/li>\n    <li>Using a CSS background image<\/li>\n    <li>Loading an image through JavaScript<\/li>\n    <li>Sending the wrong responsive candidate<\/li>\n    <li>Using a cached version of the previous asset<\/li>\n<\/ul>\n<p>For example, CSS background images can be harder for the browser&#8217;s preload scanner to discover than ordinary <code>&lt;img&gt;<\/code> elements.<\/p>\n<p><strong>Google&#8217;s web.dev<\/strong> guidance <a href=\"https:\/\/web.dev\/articles\/serve-responsive-images\" target=\"_blank\" rel=\"noopener\">recommends using responsive <code>&lt;img&gt;<\/code> markup<\/a> where practical for important images. So always test the <strong>live URL<\/strong>, not just the optimized source file.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Common_Mistakes_When_Fixing_PageSpeed_Insights_Image_Issues\"><\/span>Common Mistakes When Fixing PageSpeed Insights Image Issues<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Fixing image issues isn&#8217;t just about making files smaller. Some common optimization shortcuts can actually create new performance problems or leave the original <a href=\"https:\/\/imageoptimizerpro.ai\/blog\/common-image-issues-pagespeed-insights\/\">PageSpeed Insights warnings<\/a> unresolved.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Compressing_the_same_image_repeatedly\"><\/span>Compressing the same image repeatedly<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If the issue is incorrect dimensions or loading priority, additional compression won&#8217;t solve it.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Converting_everything_to_WebP_or_AVIF\"><\/span>Converting everything to WebP or AVIF<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Modern formats are useful, but format selection should consider image type, quality, compatibility, and actual file size.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Lazy-loading_every_image\"><\/span>Lazy-loading every image<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Above-the-fold and LCP images generally need different treatment from below-the-fold images.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Serving_one_image_size_everywhere\"><\/span>Serving one image size everywhere<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Responsive images exist precisely because a single asset rarely fits every viewport efficiently.<\/p>\n\n<h3><span class=\"ez-toc-section\" id=\"Optimizing_only_the_original_files\"><\/span>Optimizing only the original files<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The live page may generate or request another version. Always verify the actual network request.<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If your images still fail PageSpeed Insights after compression, the answer usually isn&#8217;t \u201ccompress them more.\u201d<\/p>\n<p>Look beyond file size.<\/p>\n<p> Check whether the image is properly sized, responsive, delivered in an efficient format, loaded at the right priority, and served through an efficient delivery path. Then verify what the live page actually requests.<\/p>\n<p>That shift from image compression to complete image delivery optimization is what turns a collection of smaller images into a genuinely faster page.<\/p>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<style>\n\t\t#faqsu-faq-list {\n\t\t\tbackground: #F0F4F8;\n\t\t\tborder-radius: 5px;\n\t\t\tpadding: 15px;\n\t\t}\n\t\t#faqsu-faq-list .faqsu-faq-single {\n\t\t\tbackground: #fff;\n\t\t\tpadding: 15px 15px 20px;\n\t\t\tbox-shadow: 0px 0px 10px #d1d8dd, 0px 0px 40px #ffffff;\n\t\t\tborder-radius: 5px;\n\t\t\tmargin-bottom: 1rem;\n\t\t}\n\t\t#faqsu-faq-list .faqsu-faq-single:last-child {\n\t\t\tmargin-bottom: 0;\n\t\t}\n\t\t#faqsu-faq-list .faqsu-faq-question {\n\t\t\tborder-bottom: 1px solid #F0F4F8;\n\t\t\tpadding-bottom: 0.825rem;\n\t\t\tmargin-bottom: 0.825rem;\n\t\t\tposition: relative;\n\t\t\tpadding-right: 40px;\n\t\t}\n\t\t#faqsu-faq-list .faqsu-faq-question:after {\n\t\t\tcontent: \"?\";\n\t\t\tposition: absolute;\n\t\t\tright: 0;\n\t\t\ttop: 0;\n\t\t\twidth: 30px;\n\t\t\tline-height: 30px;\n\t\t\ttext-align: center;\n\t\t\tcolor: #c6d0db;\n\t\t\tbackground: #F0F4F8;\n\t\t\tborder-radius: 40px;\n\t\t\tfont-size: 20px;\n\t\t}\n\t\t<\/style>\n\t\t\n\t\t<section id=\"faqsu-faq-list\" itemscope itemtype=\"http:\/\/schema.org\/FAQPage\"><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"Why_do_images_fail_PageSpeed_Insights_even_after_compression\"><\/span>Why do images fail PageSpeed Insights even after compression?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">Images can still fail because they are oversized, delivered in inefficient formats, loaded too late, not served responsively, or delivered inefficiently. Compression only reduces file size.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"Does_converting_images_to_WebP_fix_PageSpeed_Insights\"><\/span>Does converting images to WebP fix PageSpeed Insights?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">Not always. <\/span><b>WebP image optimization<\/b><span style=\"font-weight: 400\"> can reduce file size, but PageSpeed Insights may still flag an image if its dimensions are excessive, its loading priority is poor, or it is not delivered responsively.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"Why_are_my_compressed_images_still_slow\"><\/span>Why are my compressed images still slow?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">Compressed images can still load slowly when network delivery, image dimensions, request priority, server response time, or the number of simultaneously loaded resources is causing delay.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"Should_I_lazy-load_images_to_improve_PageSpeed_Insights\"><\/span>Should I lazy-load images to improve PageSpeed Insights?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">Usually, below-the-fold images can benefit from lazy loading. However, you generally should not lazy-load the LCP image because doing so can delay its request and hurt LCP.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"How_do_I_properly_size_images_for_PageSpeed_Insights\"><\/span>How do I properly size images for PageSpeed Insights?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">Create multiple image versions and use <\/span><em><span style=\"font-weight: 400\">srcset<\/span><\/em><span style=\"font-weight: 400\"> and <\/span><em><span style=\"font-weight: 400\">sizes<\/span><\/em><span style=\"font-weight: 400\"> so the browser can select an appropriate resource for the viewport. Also provide accurate image dimensions.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div class=\"faqsu-faq-single\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\">\n\t\t\t\t\t<h3 class=\"faqsu-faq-question\" itemprop=\"name\"><span class=\"ez-toc-section\" id=\"Can_image_optimization_improve_mobile_conversion_rates\"><\/span>Can image optimization improve mobile conversion rates?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\t\t\t\t\t<div itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\">\n\t\t\t\t\t\t<div class=\"faqsu-faq-answare\" itemprop=\"text\"><span style=\"font-weight: 400\">It can contribute to a faster, smoother shopping experience, particularly when image-heavy pages are slowing down mobile users. Faster image loading can also improve LCP and reduce unnecessary data usage. For the broader relationship between performance and ecommerce behavior, see how image optimization increases conversion rate and why large images can hurt mobile conversion rates.<\/span><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>TL;DR: If your images still fail PageSpeed Insights after compression, compression is only solving one part of the problem. Google may still flag images that are oversized, delivered in the wrong format, loaded too late, missing responsive sizing, or competing with other resources. The fix is to optimize the entire image delivery path, not just [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":741,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-740","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-image-optimization"],"_links":{"self":[{"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/posts\/740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/comments?post=740"}],"version-history":[{"count":3,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/posts\/740\/revisions"}],"predecessor-version":[{"id":745,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/posts\/740\/revisions\/745"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/media\/741"}],"wp:attachment":[{"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/media?parent=740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/categories?post=740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imageoptimizerpro.ai\/blog\/wp-json\/wp\/v2\/tags?post=740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}