{"id":31590,"date":"2020-06-16T11:24:27","date_gmt":"2020-06-16T08:24:27","guid":{"rendered":"https:\/\/themeisle.com\/blog\/?p=31590"},"modified":"2023-07-16T09:09:29","modified_gmt":"2023-07-16T06:09:29","slug":"regenerate-thumbnails-wordpress","status":"publish","type":"post","link":"https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/","title":{"rendered":"How to Regenerate Thumbnails in WordPress (Fast &#038; Easy)"},"content":{"rendered":"\n<p>Looking for an easy way to regenerate thumbnails in WordPress?<\/p>\n\n\n\n<p>When you add images to WordPress, WordPress automatically resizes your uploads into different sizes according to your theme and media settings.<\/p>\n\n\n\n<p>If you change themes or edit your thumbnail settings, this can cause a problem where all of your existing images still use the old sizes. Learning how to regenerate WordPress images lets you fix that problem by automatically applying the new image sizes to all of your existing images.<\/p>\n\n\n\n<!--more-->\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>In this post, you&#8217;ll learn <a href=\"#regenerate-thumbnails-tutorial\">how to easily regenerate WordPress thumbnails<\/a> using a free plugin. We&#8217;ll then answer a few <a href=\"#regenerate-thumbnails-faq\">commonly asked questions<\/a> about regenerating thumbnails.<\/p>\n\n\n\n<p>Let&#8217;s jump in&#8230;<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\t\t<div class='ti-tweet-clear'><\/div>\n\t\t\t<div class='ti-tweet_wrapper'>\n\t\t    \t<div class='ti-tweet_text'>\n\t\t    \t\t<a href='https:\/\/twitter.com\/share?text=Problems+with+%23WordPress+thumbnails%3F+Here%27s+how+to+regenerate+them+%F0%9F%96%BC%EF%B8%8F&via=themeisle&related=themeisle&url=https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/' target='_blank' rel='nofollow'>Problems with #WordPress thumbnails? Here's how to regenerate them \ud83d\uddbc\ufe0f<\/a>\n\t\t    \t<\/div>\n\t\t    \t<div class='ti-tweet_sharebtn'>\n\t\t    \t<a href='https:\/\/twitter.com\/share?text=Problems+with+%23WordPress+thumbnails%3F+Here%27s+how+to+regenerate+them+%F0%9F%96%BC%EF%B8%8F&via=themeisle&related=themeisle&url=https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/' target='_blank' rel='nofollow'>Click To Tweet \n\t\t    \t\t<span><\/span>\n\t\t    \t<\/a>\n\t\t    <\/div>\n\t\t<\/div>\n<\/div>\n<\/div>\n\n\n<div class=\"su-divider su-divider-style-dotted\" style=\"margin:40px 0;border-width:1px;border-color:#999999\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"regenerate-thumbnails-tutorial\">How to fix images using Regenerate Thumbnails \ud83d\udd27<\/h2>\n\n\n<div class=\"wp-pic-wrapper align-center large\" style=\"margin:20px 0;\"><div class=\"wp-pic large plugin wp-pic-ajax scheme2\"  id=\"wp-pic-Regenerate-Thumbnails\"data-type=\"plugin\" data-slug=\"Regenerate-Thumbnails\" data-image=\"\" data-expiration=\"\"  data-layout=\"large\" data-slugs=\"[]\" ><div class=\"wp-pic-body-loading\"><div class=\"signal\"><\/div><\/div><\/div><\/div><!-- .wp-pic-wrapper--><link rel='stylesheet' id='dashicons-css' href='https:\/\/themeisle.com\/blog\/wp-includes\/css\/dashicons.min.css?ver=6.8.5' type='text\/css' media='all' \/>\n<link rel='stylesheet' id='wppic-style-css' href='https:\/\/themeisle.com\/blog\/wp-content\/plugins\/wp-plugin-info-card\/dist\/wppic-styles.css?ver=6.1.1' type='text\/css' media='all' \/>\n<script type=\"text\/javascript\" src=\"https:\/\/themeisle.com\/blog\/wp-includes\/js\/jquery\/jquery.min.js?ver=3.7.1\" id=\"jquery-core-js\"><\/script>\n<script type=\"text\/javascript\" src=\"https:\/\/themeisle.com\/blog\/wp-includes\/js\/jquery\/jquery-migrate.min.js?ver=3.4.1\" id=\"jquery-migrate-js\"><\/script>\n<script type=\"text\/javascript\" id=\"wppic-script-js-extra\">\n\/* <![CDATA[ *\/\nvar wppicAjax = {\"ajaxurl\":\"https:\\\/\\\/themeisle.com\\\/blog\\\/wp-admin\\\/admin-ajax.php\"};\n\/* ]]> *\/\n<\/script>\n<script type=\"text\/javascript\" src=\"https:\/\/themeisle.com\/blog\/wp-content\/plugins\/wp-plugin-info-card\/assets\/js\/wppic-script.min.js?ver=6.1.1\" id=\"wppic-script-js\"><\/script>\n\n\n\n\n<p>Regenerate Thumbnails is a simple plugin that allows you to regenerate thumbnail dimensions for media that you have already uploaded.<\/p>\n\n\n\n<p>Here&#8217;s how to use it&#8230;<\/p>\n\n\n<div class=\"su-divider su-divider-style-default\" style=\"margin:40px 0;border-width:15px;border-color:#4267cf\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">1. Install and activate the Regenerate Thumbnails plugin <\/h3>\n\n\n<div class=\"wp-block-image blog-img-std\">\n<figure class=\"aligncenter size-full\"><img data-opt-id=40016238  fetchpriority=\"high\" decoding=\"async\" width=\"1519\" height=\"448\" src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-‹-My-Wordpress-—-WordPress.png\" alt=\"Install Regenerate Thumbnails plugin\" class=\"wp-image-31593\" title=\"\" srcset=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:448\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 1519w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:88\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 300w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:302\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 1024w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:768\/h:227\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 768w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:50\/h:15\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 50w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:480\/h:142\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 480w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:794\/h:234\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 794w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1200\/h:354\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 1200w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:296\/h:87\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 296w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:390\/h:115\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 390w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:270\/h:80\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 270w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:448\/q:mauto\/f:best\/dpr:2\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/Add-Plugins-\u2039-My-Wordpress-\u2014-WordPress.png 2x\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure><\/div>\n\n\n<p>To get started, go to <strong>Plugins -&gt; Add New<\/strong> and search for the plugin. Then, install and activate the plugin.<\/p>\n\n\n\n<p>\ud83d\udc49 <a href=\"https:\/\/themeisle.com\/blog\/how-to-install-a-wordpress-plugin\/\" class=\"ek-link\">How to install a WordPress plugin<\/a><\/p>\n\n\n<div class=\"su-divider su-divider-style-default\" style=\"margin:40px 0;border-width:15px;border-color:#4267cf\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2. Customize settings and run plugin <\/h3>\n\n\n<div class=\"wp-block-image blog-img-std\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png\"><img data-opt-id=1293123307  fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"494\" src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:494\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png\" alt=\"Regenerate Thumbnails plugin - Customize settings\" class=\"wp-image-66844\" title=\"\" srcset=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:494\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 1024w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:145\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 300w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:768\/h:371\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 768w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:50\/h:24\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 50w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:480\/h:232\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 480w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:794\/h:383\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 794w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1200\/h:579\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 1200w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:296\/h:143\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 296w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:390\/h:188\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 390w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:270\/h:130\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 270w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:733\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 1519w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:733\/q:mauto\/f:best\/dpr:2\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2023\/04\/regenerate-thumbnails-options.png 2x\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/a><\/figure><\/div>\n\n\n<p>Once you&#8217;ve activated the plugin, go to <strong>Tools -&gt; Regenerate Thumbnails<\/strong> to access its settings.<\/p>\n\n\n\n<p>The plugin is pretty basic, so you won&#8217;t have a lot of customization features, but you can do two little tweaks. <\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Skip images that you have uploaded after installing the theme. It will be usually enabled by default.<\/li>\n\n\n\n<li>Delete thumbnail files for old unregistered sizes, which will help you free up server space.<\/li>\n<\/ol>\n\n\n\n<p>When in doubt, leave these settings as the defaults.<\/p>\n\n\n\n<p>Once you&#8217;ve made your choices, you can click one of the blue buttons to either:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Regenerate all thumbnails<\/li>\n\n\n\n<li>Only regenerate <a href=\"https:\/\/themeisle.com\/blog\/wordpress-featured-image\/\" class=\"ek-link\">featured images<\/a> (this is usually all you need if you&#8217;re changing WordPress themes).<\/li>\n<\/ol>\n\n\n\n<p>If you&#8217;re not sure which one to choose, click the first button to regenerate all thumbnails.<\/p>\n\n\n<div class=\"su-divider su-divider-style-default\" style=\"margin:40px 0;border-width:15px;border-color:#4267cf\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3. Wait for the plugin to work its magic<\/h3>\n\n\n<div class=\"wp-block-image blog-img-std\">\n<figure class=\"aligncenter size-full\"><img data-opt-id=908696695  fetchpriority=\"high\" decoding=\"async\" width=\"1519\" height=\"733\" src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-‹-My-Wordpress-—-WordPress.png\" alt=\"Processing regenerate thumbnails\" class=\"wp-image-31591\" title=\"\" srcset=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:733\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 1519w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:145\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 300w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:494\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 1024w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:768\/h:371\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 768w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:50\/h:24\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 50w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:480\/h:232\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 480w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:794\/h:383\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 794w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1200\/h:579\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 1200w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:296\/h:143\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 296w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:390\/h:188\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 390w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:270\/h:130\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 270w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1519\/h:733\/q:mauto\/f:best\/dpr:2\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2020\/05\/100-Regenerate-Thumbnails-\u2039-My-Wordpress-\u2014-WordPress.png 2x\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure><\/div>\n\n\n<p>As soon as you hit the button, the plugin will start regenerating your site&#8217;s thumbnails. The process will usually take a few seconds but could extend to a few minutes depending on how many images your site has.<\/p>\n\n\n<div class=\"su-divider su-divider-style-dotted\" style=\"margin:40px 0;border-width:1px;border-color:#999999\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"regenerate-thumbnails-faq\">Regenerate thumbnails in WordPress FAQ \ud83d\ude4b<\/h2>\n\n\n\n<div id=\"wp-block-themeisle-blocks-accordion-fe0d0cf9\" data-has-schema=\"true\" class=\"wp-block-themeisle-blocks-accordion\">\n<details open class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div><strong>Why are my thumbnails not working in WordPress?<\/strong><\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<p>There could be several reasons why your thumbnails are not working in WordPress. Here are a few common issues to check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Regeneration<\/strong>: If you recently changed thumbnail dimensions or settings, you might need to regenerate thumbnails for existing images using the Regenerate Thumbnails plugin we mentioned in this tutorial.<\/li>\n\n\n\n<li><strong>File Permissions<\/strong>: Ensure that the appropriate file permissions are set for the uploads folder (typically <em>wp-content\/uploads<\/em>). The folder and its subdirectories should have proper read and write permissions (typically 755 or 775).<\/li>\n\n\n\n<li><strong>Image Size Limitations<\/strong>: If your hosting environment has restrictions on image file sizes, it may prevent the creation or display of thumbnails for larger images. Check with your hosting provider for any limitations in place.<\/li>\n\n\n\n<li><strong>Theme or Plugin Conflict<\/strong>: A conflict with your WordPress theme or a plugin could be causing thumbnail issues. Try temporarily switching to a default WordPress theme and deactivating plugins to see if the problem persists.<\/li>\n\n\n\n<li><strong>PHP GD Library<\/strong>: Thumbnails rely on the PHP GD library for image manipulation. Ensure that GD library is installed and enabled on your server. Contact your hosting provider if you&#8217;re unsure or need assistance with this.<\/li>\n\n\n\n<li><strong>PHP Memory Limit<\/strong>: Insufficient PHP memory limit can sometimes cause thumbnail generation issues. Increase the PHP memory limit in your server&#8217;s configuration file (<em>php.ini<\/em>) or consult your hosting provider for assistance.<\/li>\n\n\n\n<li><strong>Incorrect Thumbnail Settings<\/strong>: Double-check the thumbnail settings in your WordPress dashboard (<em>Settings -&gt; Media<\/em>) to ensure they match your requirements.<\/li>\n<\/ul>\n\n\n\n<p>By investigating these potential causes, you can narrow down the reason why thumbnails are not working in your WordPress site and take appropriate steps to resolve the issue.<\/p>\n<\/div><\/details>\n\n\n\n<details open class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div><strong>What does force regenerate thumbnails do?<\/strong><\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<p>The Force Regenerate Thumbnails <a href=\"https:\/\/wordpress.org\/plugins\/force-regenerate-thumbnails\/\" target=\"_blank\" rel=\"noopener\">plugin<\/a> &#8211; not to be confused with the similarly titled Regenerate Thumbnails plugin that we discussed in this post &#8211; allows you to regenerate thumbnails for all your images, regardless of whether they have been modified or not. It disregards the existing thumbnail images and recreates them from the original images based on the updated thumbnail settings.<\/p>\n<\/div><\/details>\n\n\n\n<details open class=\"wp-block-themeisle-blocks-accordion-item\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div><strong>How do I regenerate thumbnails in WordPress without plugins?<\/strong><\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<p>To regenerate thumbnails in WordPress without using plugins, you can utilize the built-in functionality of the <a href=\"https:\/\/themeisle.com\/blog\/wp-cli\/\">wp-cli<\/a> command-line interface. This does require some programming knowledge however and isn&#8217;t recommended for non-technical WordPress users. You can see more on the WordPress developer <a href=\"https:\/\/developer.wordpress.org\/cli\/commands\/media\/regenerate\/\" target=\"_blank\" rel=\"noopener\">resources page about this topic<\/a>.<\/p>\n<\/div><\/details>\n<\/div>\n\n\n<div class=\"su-divider su-divider-style-dotted\" style=\"margin:40px 0;border-width:1px;border-color:#999999\"><a href=\"#\" style=\"color:#999999\">Go to top<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Final words \ud83d\udcac<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>Whether you <a href=\"https:\/\/themeisle.com\/blog\/how-to-change-a-wordpress-theme\/\" class=\"ek-link\">changed WordPress themes<\/a> or your media settings, this simple and free plugin can help.<\/p>\n\n\n\n<p>However, there&#8217;s more to optimizing your WordPress images than just getting the settings right.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n\t\t<div class='ti-tweet-clear'><\/div>\n\t\t\t<div class='ti-tweet_wrapper'>\n\t\t    \t<div class='ti-tweet_text'>\n\t\t    \t\t<a href='https:\/\/twitter.com\/share?text=Problems+with+%23WordPress+thumbnails%3F+Here%27s+how+to+regenerate+them+%F0%9F%96%BC%EF%B8%8F&via=themeisle&related=themeisle&url=https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/' target='_blank' rel='nofollow'>Problems with #WordPress thumbnails? Here's how to regenerate them \ud83d\uddbc\ufe0f<\/a>\n\t\t    \t<\/div>\n\t\t    \t<div class='ti-tweet_sharebtn'>\n\t\t    \t<a href='https:\/\/twitter.com\/share?text=Problems+with+%23WordPress+thumbnails%3F+Here%27s+how+to+regenerate+them+%F0%9F%96%BC%EF%B8%8F&via=themeisle&related=themeisle&url=https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/' target='_blank' rel='nofollow'>Click To Tweet \n\t\t    \t\t<span><\/span>\n\t\t    \t<\/a>\n\t\t    <\/div>\n\t\t<\/div>\n<\/div>\n<\/div>\n\n\n\n<p>You also need to compress them and make sure you&#8217;re serving the optimal <a href=\"https:\/\/themeisle.com\/blog\/thumbnail-size\/\">thumbnail size<\/a> to visitors. To help you do that, you can use a free plugin such as <a aria-label=\" (opens in a new tab)\" class=\"ek-link\" href=\"https:\/\/optimole.com\/\" target=\"_blank\" rel=\"noopener\">Optimole<\/a>.<\/p>\n\n\n<div class=\"su-note\"  style=\"border-color:#e5e1b2;border-radius:3px;-moz-border-radius:3px;-webkit-border-radius:3px;\"><div class=\"su-note-inner su-u-clearfix su-u-trim\" style=\"background-color:#FFFBCC;border-color:#ffffff;color:#333333;border-radius:3px;-moz-border-radius:3px;-webkit-border-radius:3px;\">\n\n\n\n<p>\ud83d\udca1 If you found this useful, then you&#8217;ll probably also appreciate our roundup of the <a href=\"https:\/\/themeisle.com\/blog\/wordpress-image-optimizer-plugins-compared\/\">best WordPress image optimizer plugins<\/a>.<\/p>\n\n\n<\/div><\/div>\n\n\n\n<p><strong><em>Do you have any questions about how to regenerate your WordPress site&#8217;s thumbnails? Ask us in the comments and we&#8217;ll try to help!<\/em><\/strong><\/p>\n\n\n<style>.ticss-d144f107 strong{font-weight: 700;\n    letter-spacing: -0.2px;\n    line-height: 1.2;\n    display: inline-block;}<\/style>\n\n\n<div class=\"wp-block-columns speed-guide has-white-color has-text-color has-background has-link-color wp-elements-2f81f6c5526477b5b4d52d1ca4513949 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\" style=\"background-color:#4267cf\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\">\n<figure class=\"wp-block-image size-medium\"><img data-opt-id=30701221  data-opt-src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:300\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png\"  decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:300\/q:eco\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png\" alt=\"speed guide\" class=\"wp-image-113040\" old-srcset=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:300\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 300w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:1024\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 1024w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:150\/h:150\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 150w, 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https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:148\/h:148\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 148w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:195\/h:195\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 195w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:135\/h:135\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 135w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1080\/h:1080\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 1200w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1080\/h:1080\/q:mauto\/f:best\/dpr:2\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 2x\" \/><noscript><img data-opt-id=30701221  decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:300\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png\" alt=\"speed guide\" class=\"wp-image-113040\" srcset=\"https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:300\/h:300\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 300w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1024\/h:1024\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 1024w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:150\/h:150\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 150w, 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https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:148\/h:148\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 148w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:195\/h:195\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 195w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:135\/h:135\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 135w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1080\/h:1080\/q:mauto\/f:best\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 1200w, https:\/\/mllj2j8xvfl0.i.optimole.com\/cb:c5QE.37290\/w:1080\/h:1080\/q:mauto\/f:best\/dpr:2\/https:\/\/themeisle.com\/blog\/wp-content\/uploads\/2025\/09\/e2ce20299a807336c68c2e029640adaa1.png 2x\" sizes=\"(max-width: 300px) 100vw, 300px\" \/></noscript><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center ticss-58e79f2f\" style=\"font-size:14px\"><strong>FREE GUIDE<\/strong><\/p>\n\n\n\n<p class=\"ticss-d144f107\" style=\"font-size:25px\"><strong>4 Essential Steps to Speed Up Your&nbsp;WordPress Website<\/strong><\/p>\n\n\n\n<p class=\"ticss-3b627beb\">Follow the simple steps in our 4-part mini series and reduce your loading times by 50-80%.&nbsp;\ud83d\ude80<\/p>\n\n\n<p><div class=\"frm_forms  with_frm_style frm_style_themeisle\" id=\"frm_form_4_container\" data-token=\"1e74efb521908603f2c2f54d27b3121e\">\n<form enctype=\"multipart\/form-data\" method=\"post\" class=\"frm-show-form  frm_pro_form \" id=\"form_site-speed-guide-below-post\" data-token=\"1e74efb521908603f2c2f54d27b3121e\">\n<div class=\"frm_form_fields \">\n<fieldset>\n<legend class=\"frm_screen_reader\">Site Speed Guide - Below Post<\/legend>\r\n\r\n<div class=\"frm_fields_container\">\n<input type=\"hidden\" name=\"frm_action\" value=\"create\" \/>\n<input type=\"hidden\" name=\"form_id\" value=\"4\" \/>\n<input type=\"hidden\" name=\"frm_hide_fields_4\" id=\"frm_hide_fields_4\" value=\"\" \/>\n<input type=\"hidden\" name=\"form_key\" value=\"site-speed-guide-below-post\" \/>\n<input type=\"hidden\" name=\"item_meta[0]\" value=\"\" \/>\n<input type=\"hidden\" id=\"frm_submit_entry_4\" name=\"frm_submit_entry_4\" value=\"425935a91c\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/blog\/wp-json\/wp\/v2\/posts\/31590\" \/><input type=\"hidden\" name=\"item_meta[18]\" id=\"field_6px6q2\" value=\"\/blog\/wp-json\/wp\/v2\/posts\/31590\"  data-frmval=\"\/blog\/wp-json\/wp\/v2\/posts\/31590\"   \/>\n<div id=\"frm_field_15_container\" class=\"frm_form_field form-field  frm_required_field frm_none_container\">\r\n\t<label for=\"field_6px6q\" id=\"field_6px6q_label\" class=\"frm_primary_label\">Your Email\r\n\t\t<span class=\"frm_required\" aria-hidden=\"true\">*<\/span>\r\n\t<\/label>\r\n\t<input type=\"email\" id=\"field_6px6q\" name=\"item_meta[15]\" value=\"\"  autocomplete=\"email\"  placeholder=\"your@email.com\" data-reqmsg=\"Your Email cannot be blank.\" aria-required=\"true\" data-invmsg=\"Your Email is invalid\" aria-invalid=\"false\"  \/>\r\n\t\r\n\t\r\n<\/div>\n<div id=\"frm_field_17_container\" class=\"frm_form_field form-field  frm_none_container vertical_radio\">\r\n\t<div  id=\"field_6px6q3_label\" class=\"frm_primary_label\">Subscribe to our newsletter\r\n\t\t<span class=\"frm_required\" aria-hidden=\"true\"><\/span>\r\n\t<\/div>\r\n\t<div class=\"frm_opt_container\" aria-labelledby=\"field_6px6q3_label\" role=\"group\">\t\t<div class=\"frm_checkbox\" id=\"frm_checkbox_17-0\">\t\t\t<label  for=\"field_6px6q3-0\">\n\t\t\t<input type=\"checkbox\" name=\"item_meta[17][]\" id=\"field_6px6q3-0\" value=\"true\"  data-invmsg=\"Subscribe to our newsletter is invalid\" aria-invalid=\"false\"   \/> Subscribe to our newsletter<\/label><\/div>\n<\/div>\r\n\t\r\n\t\r\n<\/div>\n<div id=\"frm_field_14_container\" class=\"frm_form_field form-field \">\r\n\t<div class=\"frm_submit frm_flex\">\r\n<button class=\"frm_button_submit frm_final_submit\" type=\"submit\"   formnovalidate=\"formnovalidate\">FREE ACCESS<\/button>\r\n\r\n\r\n\r\n<\/div>\r\n<\/div>\n\t<input type=\"hidden\" name=\"item_key\" value=\"\" \/>\n\t\t\t<div id=\"frm_field_24_container\">\n\t\t\t<label for=\"field_gh4xq\" >\n\t\t\t\tIf you are human, leave this field blank.\t\t\t<\/label>\n\t\t\t<input  id=\"field_gh4xq\" type=\"text\" class=\"frm_form_field form-field frm_verify\" name=\"item_meta[24]\" value=\"\"  \/>\n\t\t<\/div>\n\t\t<input name=\"frm_state\" type=\"hidden\" value=\"tGKtIG19U6wyYcew8uBttWH0+bAcQs6D4N\/wYhYgJBswF9M0QAXa6pd1+Qu8+H8p\" \/><\/div>\n<\/fieldset>\n<\/div>\n\n<p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"ak_\"><label>&#916;<textarea name=\"ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"ak_js\" value=\"89\"\/><script>document.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );<\/script><\/p><\/form>\n<\/div>\n<\/p>\n<\/div>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"When you add images to WordPress, WordPress automatically resizes your uploads into different sizes according to your theme and media settings. If you change themes or edit your thumbnail settings, this can cause a problem where all of your existing images still use the old sizes. Learning how to regenerate WordPress images lets you fix that problem and in this tutorial we&#8217;re going to teach you how to do it.","protected":false},"author":46,"featured_media":32202,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_stopmodifiedupdate":true,"_modified_date":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[272],"tags":[],"hashtags":[],"class_list":["post-31590","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-wordpress-tutorials"],"wppr_data":{"cwp_meta_box_check":"No"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.8 (Yoast SEO v26.1.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Regenerate Thumbnails in WordPress (Fast &amp; Easy)<\/title>\n<meta name=\"description\" content=\"Have you accidentally messed up your thumbnail images? Just use this guide to regenerate thumbnails in a few minutes (for free!)\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/themeisle.com\/blog\/regenerate-thumbnails-wordpress\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Regenerate Thumbnails in WordPress (Fast &amp; Easy)\" \/>\n<meta property=\"og:description\" content=\"Have you accidentally messed up your thumbnail images? 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