Convert JPG, PNG, GIF, and BMP images to WebP for smaller file sizes and faster page loads. 100% browser-based — no upload to any server.
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Supports JPG, PNG, GIF, BMP, TIFF · Multiple files at once
WebP is a modern image format developed by Google in 2010 and now supported by all major browsers. It provides superior lossless and lossy compression for images on the web, resulting in files that are 25–35% smaller than comparable JPEG files and 26% smaller than PNG files at the same visual quality. For image-heavy websites, converting to WebP can dramatically reduce page load times, improve Core Web Vitals scores, and lower bandwidth costs.
JPEG has been the standard format for photographs and complex images since the early 1990s. It uses lossy compression that reduces file size by discarding visual information that the human eye is less sensitive to. WebP's lossy mode uses a more sophisticated compression algorithm than JPEG, achieving significantly smaller files at equivalent or better visual quality. At the same quality setting, WebP files are typically 25–35% smaller than JPEG.
PNG uses lossless compression — no quality is lost — making it ideal for graphics, logos, screenshots, and images with text. WebP also supports lossless compression that outperforms PNG by approximately 26% in file size. Additionally, WebP supports transparency (alpha channel) in both lossless and lossy modes, whereas JPEG does not support transparency at all.
Google's Core Web Vitals include Largest Contentful Paint (LCP), which measures how long it takes for the largest visible element (often an image) to render. Smaller WebP images load faster, directly improving LCP scores. Google PageSpeed Insights explicitly recommends serving images in next-generation formats like WebP and AVIF. A good LCP score (under 2.5 seconds) is a positive ranking signal in Google Search as of the Page Experience algorithm update.
WebP is supported in Chrome (since 2011), Firefox (since 2019), Safari (since macOS Big Sur and iOS 14, 2020), Edge, and Opera. Global browser support is now over 96%. For the small percentage of users on legacy browsers, use the HTML <picture> element with a WebP source and a JPEG/PNG fallback: <picture><source srcset="image.webp" type="image/webp"><img src="image.jpg"></picture>.
For most web images, a quality setting of 80–85% provides an excellent balance between file size and visual quality. Photographs and complex images can often go as low as 75% without visible degradation. For product images where fine detail matters, use 85–90%. For hero images and full-bleed backgrounds, 80% is typically sufficient. The lossless mode is best for logos, icons, and UI graphics where pixel-perfect accuracy matters more than file size.
For WordPress sites, plugins like ShortPixel, Smush, or EWWW Image Optimizer can automatically convert and serve WebP images. For custom sites, configure your web server to serve pre-generated WebP files when supported: in Apache, use mod_rewrite to redirect to .webp versions when the browser's Accept header includes image/webp. In Nginx, use a map directive to conditionally serve WebP. Modern build tools like Webpack, Vite, and Next.js can handle WebP conversion automatically during the build process.