Drop in a JPEG, PNG, or GIF to compress, resize, and convert it to WebP. The conversion runs entirely in your browser, so your files are never uploaded to a server. After converting, you'll see exactly how many bytes you saved.
Three steps, and nothing leaves your device along the way.
Drag and drop your JPEG, PNG, or GIF file into the dropzone above, or click to browse your device. We support high-resolution files natively.
Use the configuration tools to resize your image proportionally or adjust the compression quality. For most web uses, a quality of 80% provides the best balance.
Click the download button. The conversion happens instantly in your browser, keeping your data completely private. Upload the new WebP to your site.
WebP usually produces smaller files than JPEG or PNG at the same visual quality. Here are the practical reasons that matters for a website.
Google's own figures put WebP at roughly 26% smaller than equivalent PNGs and 25–34% smaller than JPEGs. Lighter images load sooner, which helps your Largest Contentful Paint (LCP) — one of the Core Web Vitals Google uses in ranking. Your actual savings depend on the image; the tool above shows the real number for each file.
Many online compressors upload your files to a server first. WebPMagic doesn't — it uses the browser's built-in HTML5 Canvas API to do the conversion locally. Your images stay on your device, which is handy for unreleased product shots or anything you'd rather not upload.
On phones and slower connections, image weight is often the biggest thing standing between a tap and a rendered page. Smaller WebP files download faster, so visitors spend less time waiting — which tends to reduce bounce rates, especially on image-heavy pages.
WebP uses predictive coding, which generally avoids the blocky artifacts JPEG shows at low quality. At a quality setting around 80 the result is usually hard to tell apart from the original, while the file is noticeably smaller. It also supports transparency, so PNG logos convert without losing their alpha channel.
Most online image compressors upload your file to a server, process it there, and send the result back. That works, but it means waiting on a round trip and trusting a third party with your image.
WebPMagic does the conversion in the browser instead. When you drop in a file, JavaScript reads it into memory and draws it onto a hidden HTML5 Canvas element. Redrawing the image at your chosen scale also drops the EXIF metadata and color-profile data that bloat the original. The canvas is then encoded to WebP at your chosen quality, and the browser hands you the file to download.
Because everything runs locally, the size you can process depends on your device's memory rather than a server limit. Very large images may take a moment on older phones. The canvas approach also re-encodes the image, so converting an already-compressed file at high quality can occasionally produce a larger result — the savings readout above tells you when that happens.
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