{"id":711,"date":"2024-05-07T11:41:59","date_gmt":"2024-05-07T11:41:59","guid":{"rendered":"https:\/\/kb.shortpixel.com\/docs\/why-the-resulting-webp-images-are-bigger-than-the-original-png-files\/"},"modified":"2025-08-27T08:46:21","modified_gmt":"2025-08-27T08:46:21","password":"","slug":"why-the-resulting-webp-images-are-bigger-than-the-original-png-files","status":"publish","type":"docs","link":"https:\/\/kb.shortpixel.com\/knowledge-base\/article\/why-the-resulting-webp-images-are-bigger-than-the-original-png-files\/","title":{"rendered":"Why the resulting WebP images are bigger than the original PNG or JPG files?"},"content":{"rendered":"\n<p>The WebP compression algorithm was created, <a href=\"https:\/\/developers.google.com\/speed\/webp\/\" rel=\"noopener\">according to Google<\/a>, as an alternative for both PNG and JPEG files. Generally, the resulting WebP image is on average 26% smaller than the original PNG, and 25-34% smaller than the original JPEG. However, in some particular cases, the resulting image can be bigger &#8211; much bigger. We encountered cases when the WebP version of a PNG was double or three times the size of the original file size.&nbsp;<\/p>\n\n\n\n<p><strong>There is nothing to worry about<\/strong>,&nbsp;it is just a limitation of the WebP algorithm sometimes, especially when the original file is already optimized. Google explains it on this section of the previous page: <a href=\"https:\/\/developers.google.com\/speed\/webp\/faq#can_a_webp_image_grow_larger_than_its_source_image\" target=\"_blank\" rel=\"noopener\">Can a WebP image grow larger than its source image?<\/a><\/p>\n\n\n\n<p>Here at ShortPixel, we are always searching&nbsp;for ways to make the WebP files smaller. In fact, our work is focused on&nbsp;our API, so when an image is sent for optimization, its WebP counterpart should almost always be smaller than the JPG\/PNG\/GIF. And if it isn&#8217;t, just <a href=\"https:\/\/shortpixel.com\/contact\" target=\"_blank\" rel=\"noopener\">let us know<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The WebP compression algorithm was created, according to Google, as an alternative for both PNG and JPEG files. Generally, the resulting WebP image is on average 26% smaller than the original PNG, and 25-34% smaller than the original JPEG. However, in some particular cases, the resulting image can be bigger &#8211; much bigger. We encountered [&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-711","docs","type-docs","status-publish","hentry","doc_category-shortpixel-image-optimizer"],"blocksy_meta":[],"year_month":"2026-04","word_count":175,"total_views":"990","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\/711","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=711"}],"version-history":[{"count":1,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/711\/revisions"}],"predecessor-version":[{"id":1790,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/docs\/711\/revisions\/1790"}],"wp:attachment":[{"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/media?parent=711"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_category?post=711"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/glossaries?post=711"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/kb.shortpixel.com\/wp-json\/wp\/v2\/doc_tag?post=711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}