{"id":1153,"date":"2026-08-14T09:13:00","date_gmt":"2026-08-14T13:13:00","guid":{"rendered":"https:\/\/www.xconvert.com\/blog\/?p=1153"},"modified":"2026-06-27T01:52:02","modified_gmt":"2026-06-27T05:52:02","slug":"compress-a-webp-image","status":"publish","type":"post","link":"https:\/\/www.xconvert.com\/blog\/compress-a-webp-image","title":{"rendered":"How to Compress a WebP Image (Make WebP Smaller)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">You exported a WebP, expecting it to be tiny \u2014 WebP is the \u201cmodern, efficient\u201d format, after all \u2014 and it still came out larger than you wanted for a page that needs to load fast. The good news: a WebP file is almost always already smaller than the JPEG or PNG it replaced, so you\u2019re optimizing from a strong starting point. The win comes from lowering the quality setting (lossy mode) or scaling down oversized dimensions, not from some magic switch. This guide explains exactly what \u201ccompressing a WebP\u201d means, how much you can realistically save, and when converting <em>to<\/em> WebP from another format is the bigger prize. We verified WebP\u2019s two compression modes and the size figures against Google\u2019s own WebP documentation, MDN, and caniuse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick answer:<\/strong> A WebP is \u201ccompressed\u201d by <strong>re-encoding it in lossy mode at a lower quality<\/strong> (around <strong>75\u201385<\/strong> is the photo sweet spot) and\/or <strong>scaling its pixel dimensions<\/strong> down to the size you actually display it at. WebP already beats JPEG by <strong>25\u201334%<\/strong> and PNG by <strong>~26%<\/strong> (per Google), so it starts small \u2014 the realistic extra saving comes from quality and dimensions, not the format. If your source is a JPEG or PNG, <strong>converting it to WebP<\/strong> is usually the bigger win than re-squeezing an existing WebP.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jump to a section<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#what\">What \u201ccompressing a WebP\u201d actually means<\/a><\/li><li><a href=\"#modes\">Lossy vs lossless: which mode to use<\/a><\/li><li><a href=\"#savings\">How much smaller can you realistically go?<\/a><\/li><li><a href=\"#dimensions\">The dimensions trap (the saving you forget)<\/a><\/li><li><a href=\"#tool\">Compress a WebP image on xconvert<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what\">What \u201ccompressing a WebP\u201d actually means<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">WebP isn\u2019t a single compression scheme \u2014 it\u2019s a container that holds <strong>two different modes<\/strong>, and which one your file uses changes everything about how you shrink it. Per <a href=\"https:\/\/developers.google.com\/speed\/webp\">Google\u2019s WebP documentation<\/a> and <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/Media\/Formats\/Image_types\">MDN<\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Lossy WebP<\/strong> uses predictive coding derived from the <strong>VP8 video codec<\/strong>. It throws away visual detail you\u2019re unlikely to notice in exchange for much smaller files \u2014 the same fundamental trade-off as JPEG, just more efficient.<\/li><li><strong>Lossless WebP<\/strong> reconstructs every pixel exactly, using already-seen image fragments. It\u2019s the WebP equivalent of PNG \u2014 perfect fidelity, larger files.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">So \u201ccompressing a WebP\u201d means one of two things:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>If it\u2019s lossless<\/strong> (typical for graphics, logos, screenshots exported from design tools), the single biggest lever is <strong>re-encoding it as lossy<\/strong> \u2014 that alone can drop the size dramatically.<\/li><li><strong>If it\u2019s already lossy<\/strong>, you compress it by <strong>re-encoding at a lower quality value<\/strong> and\/or <strong>reducing the pixel dimensions<\/strong>. There\u2019s no free lunch here: a lower quality number means more detail discarded.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">This matters because WebP is <em>already<\/em> an efficient format. Unlike a bloated PNG screenshot, a WebP doesn\u2019t usually have huge, easy redundancy to strip \u2014 so set expectations honestly. The saving is real, but it comes from a deliberate quality-for-size trade, not from free \u201coptimization.\u201d<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"modes\">Lossy vs lossless: which mode to use<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The right mode depends entirely on what the image <em>is<\/em>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Image type<\/th><th>Use<\/th><th>Why<\/th><\/tr><\/thead><tbody><tr><td>Photographs, screenshots with photo content<\/td><td><strong>Lossy<\/strong><\/td><td>Continuous-tone detail compresses very well; the artifacts are nearly invisible at quality 75\u201385.<\/td><\/tr><tr><td>Logos, icons, flat illustrations, line art<\/td><td><strong>Lossless<\/strong> (or high-quality lossy)<\/td><td>Sharp edges and flat color blocks show lossy artifacts (ringing) more readily; lossless keeps them crisp.<\/td><\/tr><tr><td>Anything with transparency you must preserve exactly<\/td><td><strong>Lossless<\/strong><\/td><td>Both modes support an alpha channel, but lossless guarantees pixel-exact transparency.<\/td><\/tr><tr><td>You need the smallest possible file and some softness is acceptable<\/td><td><strong>Lossy<\/strong><\/td><td>This is where WebP\u2019s VP8-based compression shines.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Both modes support <strong>alpha transparency<\/strong> and <strong>animation<\/strong>, so switching to lossy doesn\u2019t cost you transparency \u2014 Google notes lossy WebP with transparency is roughly <strong>3\u00d7 smaller than the equivalent PNG<\/strong>. The trade-off is detail, not features.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A practical rule: <strong>photos \u2192 lossy at ~80; graphics \u2192 start lossless, only drop to high-quality lossy if you need the size.<\/strong> When in doubt, compress at a quality you think is too high, look at the result, and step it down \u2014 it\u2019s faster than starting too low and discovering you\u2019ve mangled the image.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"savings\">How much smaller can you realistically go?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is where honesty matters, because WebP\u2019s reputation sets people up for disappointment. Here are the figures from the format\u2019s owner, <a href=\"https:\/\/developers.google.com\/speed\/webp\">Google<\/a>:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Lossy WebP<\/strong> is <strong>25\u201334% smaller than a comparable JPEG<\/strong> at the same SSIM quality index.<\/li><li><strong>Lossless WebP<\/strong> is about <strong>26% smaller than PNG<\/strong>.<\/li><li>Lossy WebP <strong>with transparency<\/strong> is roughly <strong>3\u00d7 smaller than PNG<\/strong> with transparency.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Read those carefully: they describe WebP-versus-other-format. They are the reason converting a JPEG or PNG <em>to<\/em> WebP is such a strong move. But if your file is <strong>already a WebP<\/strong>, you\u2019ve already banked that advantage \u2014 re-compressing it again won\u2019t repeat the 30% windfall.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So what <em>can<\/em> you realistically save on an existing WebP?<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Lossless WebP \u2192 lossy WebP<\/strong>: often a large drop (the file was storing every pixel exactly; now it doesn\u2019t). This is the single biggest win for graphics\/screenshot WebPs.<\/li><li><strong>High-quality lossy \u2192 moderate-quality lossy<\/strong> (e.g. quality 95 \u2192 80): a meaningful drop with little visible change on photos.<\/li><li><strong>Already moderate-quality lossy \u2192 lower quality<\/strong>: diminishing returns, and visible artifacts arrive fast.<\/li><li><strong>Scaling down oversized dimensions<\/strong>: frequently the <em>biggest<\/em> saving of all \u2014 see the next section.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The honest framing: <strong>if your WebP is lossless or high-quality, you have room; if it\u2019s already a lean lossy file, expect modest gains and watch the quality.<\/strong> And if you came here with a JPEG or PNG, the <a href=\"https:\/\/www.xconvert.com\/blog\/convert-png-to-webp\/\">PNG \u2192 WebP conversion<\/a> is the bigger lever.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dimensions\">The dimensions trap (the saving you forget)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The most common reason a WebP is \u201ctoo big\u201d has nothing to do with quality \u2014 it\u2019s that the image is <strong>far larger in pixels than it\u2019s ever displayed<\/strong>. A 4000\u00d73000 photo dropped into an 800-pixel-wide blog column carries ~15\u00d7 more pixels than the screen will ever show. No quality setting fixes that; only <strong>scaling the dimensions<\/strong> does.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">File size scales roughly with pixel <em>area<\/em>, so halving both width and height cuts the pixel count to a quarter \u2014 often a bigger saving than any quality tweak, with <strong>zero<\/strong> visible loss if you scale to the display size. The order that works: find how wide the image is actually shown (a content image in an article is rarely wider than ~1200 px), scale to at most <strong>2\u00d7 that<\/strong> for high-DPI screens, and <em>then<\/em> apply lossy quality. Dimensions first, quality second.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">xconvert\u2019s compressor does both at once: it scales dimensions automatically to hit a target file size before it sacrifices quality, so scaling-then-quality is the default rather than something you wire up by hand.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tool\">Compress a WebP image on xconvert<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.xconvert.com\/compress-webp\">xconvert WebP compressor<\/a> lets you set a target size or a quality level and handles the dimension scaling for you:<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Open <a href=\"https:\/\/www.xconvert.com\/compress-webp\">xconvert.com\/compress-webp<\/a> and click <strong>Upload<\/strong> to add your <code>.webp<\/code> file (from your computer, Google Drive, or Dropbox).<\/li><li>Choose how to control the output:<\/li><li><strong>Target file size (%)<\/strong> \u2014 marked <em>(Best)<\/em> \u2014 shrink to a percentage of the original (e.g. 50% to roughly halve it).<\/li><li><strong>Specific file size<\/strong> \u2014 enter an exact target in KB\/MB and let the tool work backward to it.<\/li><li><strong>Image Quality (%)<\/strong> \u2014 set a quality value directly; <strong>75\u201385<\/strong> is the recommended sweet spot for photos.<\/li><li>Leave <strong>Auto Scale<\/strong> on (it shows <em>Smart Scaling Active<\/em>) so the tool reduces oversized dimensions to meet your target <em>before<\/em> it degrades quality \u2014 this is the dimensions saving from the section above, applied for you.<\/li><li>Click <strong>Compress<\/strong>, then download the result. Compare it to the original; if it\u2019s softer than you\u2019d like, raise the quality a few points and re-run.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Your file is uploaded over an encrypted connection, processed on our servers, and automatically deleted a few hours later \u2014 nothing stays around.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you actually started with a different format, converting to WebP is usually the larger win: see <a href=\"https:\/\/www.xconvert.com\/blog\/convert-png-to-webp\/\">convert PNG to WebP<\/a> for the transparency-preserving path that banks the 25\u201334% format advantage in the first place.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<h5 class=\"wp-block-heading\">How do I make a WebP file smaller?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Re-encode it in lossy mode at a lower quality (around 75\u201385 for photos) and scale its pixel dimensions down to the size you actually display it at.<\/strong> If the WebP is currently lossless, switching to lossy is the single biggest saving. Dimensions usually matter more than people expect \u2014 a photo far larger than its display size wastes most of its bytes.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Does compressing a WebP reduce its quality?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lossy compression always discards some detail<\/strong> \u2014 that\u2019s how it makes the file smaller. At quality 75\u201385 the loss is hard to see on photographs, but it\u2019s real and it\u2019s permanent, so keep your original. <strong>Lossless WebP<\/strong> stays pixel-perfect, but it can\u2019t shrink nearly as much. There\u2019s no setting that makes a file smaller with zero quality cost \u2014 except scaling down dimensions you don\u2019t need.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Why is my WebP still large even though WebP is \u201cefficient\u201d?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Usually because it\u2019s <strong>lossless<\/strong> (storing every pixel exactly, like a PNG) or because its <strong>pixel dimensions are far bigger than where it\u2019s shown<\/strong>. WebP\u2019s efficiency is relative to JPEG\/PNG \u2014 Google cites 25\u201334% smaller than JPEG \u2014 but an oversized, lossless WebP can still be big. Switch it to lossy and scale it to display size.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Should I compress a WebP or convert my JPEG\/PNG to WebP instead?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">If your source is a <strong>JPEG or PNG, convert it to WebP<\/strong> \u2014 that\u2019s where the headline savings live (25\u201334% vs JPEG, ~26% vs PNG per Google). Re-compressing a file that\u2019s <em>already<\/em> WebP gives smaller, diminishing returns because the format advantage is already banked. See <a href=\"https:\/\/www.xconvert.com\/blog\/convert-png-to-webp\/\">convert PNG to WebP<\/a>.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Is WebP supported in all browsers now?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Effectively yes. Per <a href=\"https:\/\/caniuse.com\/webp\">caniuse<\/a>, WebP has roughly <strong>96% global support<\/strong>: Chrome since v32, Firefox since v65, Edge since v18, and <strong>Safari since v16<\/strong> (macOS Big Sur \/ iOS 14 era and later). Internet Explorer never supported it. For the rare legacy visitor, MDN recommends a JPEG\/PNG fallback via the <code>&lt;picture&gt;<\/code> element.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">What quality setting should I use for a WebP photo?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>75\u201385<\/strong> is the widely recommended range for photographs \u2014 small enough to save meaningful size, high enough that artifacts stay invisible at normal viewing. Start at 80, look at the result, and adjust. Graphics, logos and screenshots with sharp edges do better at higher quality or in lossless mode.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Last verified 2026-06-25.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/developers.google.com\/speed\/webp\">Google \u2014 WebP: A new image format for the Web<\/a> \u2014 owner of the format; \u201clossy WebP 25\u201334% smaller than JPEG\u201d, \u201clossless WebP 26% smaller than PNG\u201d, lossy-with-transparency ~3\u00d7 smaller than PNG, and the two modes (VP8 predictive coding \/ exact pixel reconstruction).<\/li><li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/Media\/Formats\/Image_types\">MDN \u2014 Image file type and format guide (WebP)<\/a> \u2014 WebP capabilities: both lossy and lossless modes, animation, 8-bit alpha transparency, and the <code>&lt;picture&gt;<\/code> fallback recommendation.<\/li><li><a href=\"https:\/\/caniuse.com\/webp\">caniuse \u2014 WebP image format<\/a> \u2014 current browser support (~96% global; Chrome 32+, Firefox 65+, Edge 18+, Safari 16+; not in IE).<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Compress a WebP image by re-encoding lossy at quality 75-85 and scaling its dimensions. See how much you can realistically save and when converting wins.<\/p>\n","protected":false},"author":3,"featured_media":1298,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[],"class_list":["post-1153","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Compress a WebP Image (Make WebP Smaller)<\/title>\n<meta name=\"description\" content=\"Compress a WebP image by re-encoding lossy at quality 75-85 and scaling its dimensions. 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