{"id":723,"date":"2024-05-07T11:42:12","date_gmt":"2024-05-07T11:42:12","guid":{"rendered":"https:\/\/kb.shortpixel.com\/docs\/a-credit-equals-an-optimized-image\/"},"modified":"2025-08-27T08:45:59","modified_gmt":"2025-08-27T08:45:59","password":"","slug":"a-credit-equals-an-optimized-image","status":"publish","type":"docs","link":"https:\/\/kb.shortpixel.com\/knowledge-base\/article\/a-credit-equals-an-optimized-image\/","title":{"rendered":"ShortPixel Image Optimizer &#8211; A credit equals an optimized image?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1 credit = 1 image or thumbnail<\/h2>\n\n\n\n<p>A credit is used each time <a href=\"https:\/\/wordpress.org\/plugins\/shortpixel-image-optimiser\/\" target=\"_blank\" rel=\"noopener\">ShortPixel Image Optimizer<\/a> (SPIO) optimizes an image or thumbnail by <strong>at least 5%<\/strong>. If an image or thumbnail cannot be optimized by at least 5%, no credits will be deducted.<\/p>\n\n\n\n<p>When you upload an image, WordPress automatically generates <a href=\"https:\/\/shortpixel.com\/knowledge-base\/article\/this-plugin-is-creating-new-thumbnails-how-can-i-stop-it\/\" rel=\"noopener\">several thumbnails<\/a> based on your theme and plugins. <strong>Each thumbnail optimization counts as a separate credit.<\/strong>\u00a0However, you can <a href=\"https:\/\/shortpixel.com\/knowledge-base\/article\/how-can-i-optimize-only-certain-thumbnail-sizes\/\" rel=\"noopener\">exclude specific thumbnails<\/a> from optimization to reduce the number of credits used.<\/p>\n\n\n\n<p>Additionally, if you choose to <a href=\"https:\/\/shortpixel.com\/knowledge-base\/article\/how-to-serve-webp-files-using-spio\/\" rel=\"noopener\">create WebP<\/a> or <a href=\"https:\/\/shortpixel.com\/knowledge-base\/article\/how-to-create-and-serve-avif-files-using-shortpixel-image-optimizer\/\" rel=\"noopener\">AVIF<\/a> versions, an extra credit is required for each image and thumbnail that gets a WebP\/AVIF counterpart.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Example<\/h2>\n\n\n\n<p>Suppose you upload an image, and WordPress generates 8 thumbnails. You also choose to create WebP versions for both the original image and its thumbnails.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Original image optimization: <strong>1 credit<\/strong><\/li>\n\n\n\n<li>8 thumbnails optimization: <strong>8 credits<\/strong><\/li>\n\n\n\n<li>WebP creation for the original file + the thumbnails: <strong>9 credits<\/strong><\/li>\n\n\n\n<li>Total:<strong> 18 credits<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Learn more about <a href=\"https:\/\/shortpixel.com\/blog\/how-credits-work-within-your-shortpixel-account\/\" target=\"_blank\" rel=\"noopener\">how ShortPixel credits work<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CDN<\/h2>\n\n\n\n<p>Starting with version 6, SPIO offers the option to <a href=\"https:\/\/kb.shortpixel.com\/knowledge-base\/article\/deliver-webp-avif-images-using-the-shortpixel-cdn-in-spio\/\" data-type=\"docs\" data-id=\"1291\">deliver images via ShortPixel&#8217;s CDN<\/a>. If you enable this feature, one credit will be deducted for every 5 MB of CDN traffic used.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Unlimited plan<\/h2>\n\n\n\n<p>With the <a href=\"https:\/\/shortpixel.com\/pricing\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Unlimited<\/strong> plan<\/a>, credit usage becomes irrelevant. You can optimize as many images as you want, and you\u2019ll also receive <strong>500 GB of CDN traffic<\/strong> to use with the ShortPixel CDN delivery option.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1 credit = 1 image or thumbnail A credit is used each time ShortPixel Image Optimizer (SPIO) optimizes an image or thumbnail by at least 5%. If an image or thumbnail cannot be optimized by at least 5%, no credits will be deducted. When you upload an image, WordPress automatically generates several thumbnails based on [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[37],"glossaries":[],"doc_tag":[],"class_list":["post-723","docs","type-docs","status-publish","hentry","doc_category-shortpixel-image-optimizer"],"blocksy_meta":[],"year_month":"2026-04","word_count":220,"total_views":"1360","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"admin","author_nicename":"admin_mdli53m5","author_url":"https:\/\/kb.shortpixel.com\/author\/admin_mdli53m5\/"},"doc_category_info":[{"term_name":"ShortPixel Image Optimizer","term_url":"https:\/\/kb.shortpixel.com\/knowledge-base\/category\/shortpixel-image-optimizer\/"}],"doc_tag_info":[],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/comments?post=723"}],"version-history":[{"count":2,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/723\/revisions"}],"predecessor-version":[{"id":1781,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/723\/revisions\/1781"}],"wp:attachment":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/media?parent=723"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_category?post=723"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/glossaries?post=723"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_tag?post=723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}