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25–35% smaller than JPG
WebP uses predictive-coding from the VP8 video codec for images. At the same visual quality files are typically 25–35% smaller than JPG; at optimal settings up to 50% less. Direct win for mobile data and server bandwidth.
Convert JPG, PNG, GIF, and iPhone HEIC to modern WebP format. At comparable visual quality WebP is typically 25–35% smaller than JPG — a direct win for Core Web Vitals, Google PageSpeed, and mobile load time. PNG transparency preserved.
Drop image, pick mode and quality, save as WebP.
or click to browse — .jpg, .png, .gif, .heic
The WebP tool that correctly distinguishes lossy and lossless modes.
WebP uses predictive-coding from the VP8 video codec for images. At the same visual quality files are typically 25–35% smaller than JPG; at optimal settings up to 50% less. Direct win for mobile data and server bandwidth.
Unlike JPG, WebP supports an alpha channel — logos, icons, and PNG graphics keep their transparency in WebP. Lossless WebP with alpha is typically 26% smaller than the original PNG, pixel-identical to the source.
Lossy for photos (smaller, minimal visual loss), lossless for logos and graphics with sharp edges (pixel-identical). We separate the two explicitly — other tools mix them and ship unnecessarily large WebPs for logos.
Google PageSpeed Insights explicitly warns when you still use JPG/PNG instead of WebP/AVIF. The WebP update alone often delivers an 8–15 point bump in Mobile score — and a better LCP. Direct SEO factor since 2021.
After converting, the tool shows immediately: original size, WebP size, percent saved. You see tangibly how much your hero images save in visitors' browser cache.
Chrome, Edge, Firefox, and Safari 14+ have a built-in WebP encoder — we use it via Canvas API. Faster than any JavaScript library, and runs entirely in the browser. No upload, no cloud, no server processing.
Three steps. Equally good for photo and logo.
JPG, PNG, GIF, or iPhone HEIC via drag-and-drop or file dialog. HEIC works in Safari and Mac Chrome.
Lossy for photos (80% is sweet spot). Lossless for logos, icons, text screenshots — pixel-identical and still ~25% smaller than PNG.
Click Convert. Size comparison shows savings immediately. Download as .webp.
Where the switch to WebP delivers measurable wins.
All modern CMS systems serve WebP automatically when the file is available — many even convert on upload. Higher-quality source files are pre-optimized with our tool so the CMS variant starts small.
Lighthouse audits flag JPG/PNG as "Serve images in next-gen formats" — both a performance and SEO factor. Simplest fix: serve all hero images, banners, and header images as WebP.
iOS (14+) and Android support WebP natively. App asset bundles get 30–40% smaller with WebP instead of PNG/JPG — faster App Store downloads, easier to stay under the "Sub-200-MB-for-cellular" threshold.
SVG is first choice for logos, but for complex logos with gradients, lossless WebP is often smaller than the equivalent PNG export from Figma/Sketch. Transparency preserved — perfect for dark and light backgrounds.
10 product photos per listing × 1000 products = 10,000 images. Each 30% smaller saves server storage, CDN bandwidth, and noticeably improves mobile conversion rate (studies: 100ms faster load = 1–2% more purchases).
Mailchimp, Klaviyo, ActiveCampaign support WebP in modern mail clients. Newsletters with WebP images load faster, measurably improving above-the-fold engagement. Outlook 2019 can't do WebP — still need JPG fallback for cross-client compatibility.
WebP is a modern image format from Google (since 2010, broad browser support since 2020). It combines JPEG quality with about 25–35% better compression — and supports transparency like PNG, even animations like GIF. For websites it's a direct performance win.
Chrome, Firefox, Edge, Opera, Brave: fully supported for years. Safari: since version 14 (macOS Big Sur, iOS 14, Fall 2020). That covers over 97% of browsers today. For the few holdouts use the <picture> element with JPG fallback — but most sites don't need that anymore.
Yes. WebP supports alpha channel (transparency) natively — both in lossy and lossless modes. A PNG with transparent background becomes a WebP with transparent background, typically 30% smaller than the original PNG.
Lossy (quality 75–85): for photos. Visually nearly indistinguishable from original, 25–35% smaller than JPG. Lossless (quality 100): for logos, icons, screenshots, graphics with sharp edges — pixel-identical to original, about 25% smaller than PNG.
The key vital for images is LCP (Largest Contentful Paint), usually the hero image above the fold. A 1.5 MB JPG hero becomes a 1.0 MB WebP — better for mobile 4G. In Google PageSpeed Insights, the WebP update alone often produces an 8–15 point bump on Mobile.
On this page yes — we only convert the first frame to a static WebP. Animated WebP isn't natively producible by all browser APIs. For animated WebP you currently need specialized tools (ffmpeg, ImageMagick).
Works in Safari (macOS and iOS) and Chrome on macOS — the browser decodes HEIC natively. On Windows Chrome and Android browsers HEIC decoding is missing; there convert the HEIC to JPG first via iPhone built-ins.
No. WebP encoding runs via the Canvas API directly in the browser — Chrome/Edge/Firefox have a built-in WebP encoder. No server roundtrip, no logs. Page works offline once loaded.
WebP has been Google's preferred image format on the web since 2020. It combines JPEG's strengths (good photo compression) and PNG's strengths (transparency, lossless compression) in a single format — and is 25–35% smaller than the equivalent JPG or PNG. Any website operator who consistently switches to WebP can measurably lower bandwidth costs, noticeably improve load time, and significantly raise the Google PageSpeed score in Lighthouse audits. Our online converter makes the switch easy — directly in the browser, no upload.
We load the image into an HTML5 canvas and call canvas.toDataURL('image/webp', quality). This method is built into Chrome, Edge, Firefox, and Safari 14+ and uses the OS's native WebP encoder or the browser's internal libwebp implementation. That's faster than any JavaScript polyfill and produces results equivalent to Google's cwebp CLI.
Lossy WebP uses predictive coding (inherited from the VP8 video codec): each pixel is predicted from its neighbors, and only the delta is stored. Efficient for photos with smooth gradients and fine textures, but small detail information is lost. Sweet spot: 75–85% quality. Lossless WebP is lossless and uses a different algorithm (based on LZW-like backreferencing). It's pixel-identical to original — perfect for logos, icons, screenshots with text, and any graphics where every pixel matters. Typically 25% smaller than the equivalent PNG.
WebP is supported by virtually every relevant browser today: Chrome 32+ (since 2014), Firefox 65+ (since 2019), Edge 18+ (since 2018), Opera 19+, and crucially Safari 14+ (since Big Sur and iOS 14, Fall 2020). Global support per caniuse.com is over 97%. For the remaining 3% (old smart TVs, very old Android browsers, Outlook 2019) use the HTML <picture> element with JPG fallback. In practice most modern websites don't need that anymore.
Since 2021 Core Web Vitals are an official Google ranking factor. LCP (Largest Contentful Paint) — usually the big hero image above the fold — should stay under 2.5 seconds. With 1.5 MB JPG heroes on 4G that's tough. With WebP at 1.0 MB much more realistic. Lighthouse explicitly warns under "Opportunities — Serve images in next-gen formats" and penalizes with measurable score loss. The WebP migration alone often delivers 8–15 more points in Mobile score.
Logo libraries, icon sets, and product-related cutout graphics traditionally live as PNG — because PNG has transparency and JPG doesn't. WebP can do both: transparency AND significantly better compression than PNG. Lossless WebP with alpha is typically 26% smaller than the same PNG. For a logo library with 500 brand logos that's measurable server storage and CDN savings.
For similar but different tasks: Compress image keeps the format, only reduces size. Resize image changes pixel dimensions. JPG to PNG and PNG to JPG for classic format changes. For full photo editing including Lightroom-style adjustment: Photo Editor. Multiple images into one PDF: Image to PDF.