WebP often reduces the transfer size of photographs, product images and interface graphics. The right choice depends on transparency, fine text and the publishing system that will serve the file.
Open the WebP converterKeep the original PNG. Check its pixel dimensions and confirm how large it is actually displayed on the website. Converting a 4000-pixel image to WebP without resizing can leave far more data than the page needs. When possible, resize to the largest rendered width first.
WebP can preserve transparent pixels, so logos and cut-out product images can remain transparent. JPG cannot preserve transparency; this site fills transparent areas with white when JPG is selected. Check colour-critical assets in the browsers and content-management system used by your audience.
PNG can remain appropriate for small flat-colour graphics, images that require lossless editing, or systems that do not accept WebP. Screenshots with very small text may look clearer as PNG than a heavily compressed WebP. The goal is not to force one format everywhere, but to choose the smallest file that still looks correct.
Use descriptive file names and meaningful alternative text in the page where the image is used. Set explicit width and height attributes to reduce layout shifts. For responsive layouts, consider providing several sizes with srcset so mobile visitors do not download a desktop-sized asset.
No. A well-optimized PNG or JPG can occasionally be smaller. Results depend on the image and settings, so compare each output.
There is no universal value. Around 80–85% is a useful starting point for many web images, followed by visual inspection.
The DevToolRoom conversion flow runs in the browser and does not intentionally upload selected files to an image-processing server.