Most images you save from a website today arrive as WebP, because sites serve it to cut page weight by a quarter or more compared with JPG. The browser shows them fine, but the moment you try to use one elsewhere it often fails: older photo editors, print services, some email clients and plenty of upload forms only accept JPG or PNG. This page opens with JPG as the output, so you drop the WebP files and convert. Two details are worth knowing. First, WebP supports transparency and JPG does not, so a logo or product cut-out with a transparent background gets a solid fill. White is the default, and the colour picker lets you match the page the image will sit on; if you need to keep the transparency, convert to PNG instead. Second, animated WebP images are converted as a single still frame, because JPG has no animation. The JPG will usually be somewhat larger than the WebP, which is expected, since WebP is the more efficient format. Quality 85 to 92 keeps the result visually identical. To keep transparency use WebP to PNG Converter, and to shrink the result use Image Compressor.
Choosing the right image format for web use has a significant impact on file size and quality. JPEG (Joint Photographic Experts Group) uses lossy compression optimized for photographs: it discards subtle color gradients in ways the human eye does not easily notice, achieving compression ratios of 10:1 to 20:1 at acceptable quality. PNG (Portable Network Graphics) uses lossless compression and supports full transparency (alpha channel), making it ideal for logos, icons, screenshots, and images with sharp edges or text. WebP is Google's modern format that achieves better compression than both JPEG and PNG at equivalent quality: typically 25 to 35 percent smaller than JPEG at the same quality setting, and 26 percent smaller than PNG for lossless images. WebP also supports transparency like PNG. GIF (Graphics Interchange Format) is the oldest format still in use, primarily kept alive by its support for animation. For still images, GIF is inferior to PNG in both quality and compression, limited to 256 colors per frame. Converting to WebP for web delivery is the most impactful single optimization for image-heavy sites. Browser support for WebP is now essentially universal (Chrome, Firefox, Safari 14+, Edge). For cases where legacy Safari support is required, serving WebP via a picture element with a JPEG fallback provides the best result across all browsers.