How to convert JPG to WebP
Drop your JPG onto the box above, or click to choose one from your device. You will see its size and dimensions, then a single click produces the WebP and shows exactly how much smaller it is before you download. The conversion runs entirely in your browser, so photos are never uploaded to any server.
When JPG to WebP is the right move
JPG has served the web well for three decades, but it was designed in 1992, and modern formats simply store photos more efficiently. WebP, developed by Google for the web, squeezes the same photo into a file roughly a quarter to a third smaller at the same visual quality. On a single image that saves a few hundred kilobytes. Across a blog archive, a product catalog or a photo gallery, it saves gigabytes of bandwidth and shaves real seconds off page loads.
Speed is not a vanity metric. Faster pages rank better, because Google measures loading performance in its Core Web Vitals, and visitors stay longer on sites that respond quickly. Swapping JPG for WebP is one of the few changes that improves those numbers without touching your design, your content or your hosting.
How the conversion works
Your browser decodes the JPG into its full pixel grid and re-encodes it with the WebP codec at a high quality setting. WebP uses smarter prediction than JPG: instead of treating every block of the image the same way, it predicts blocks from surrounding detail and stores the corrections, which is where the extra saving comes from. JPG metadata such as camera settings and GPS tags does not carry across, so the WebP is also a cleaner file to publish.
Quality tips for JPG to WebP
- Start from the best JPG you have. Converting a small, heavily compressed JPG locks in its flaws at a smaller size. Use the original export from your camera or editor.
- Do not convert twice. WebP made from a WebP gains nothing and can lose quality. Keep a clear line between JPG masters and WebP delivery copies.
- Match dimensions to the display size. An image shown at 900 pixels wide should not be converted from a 5000 pixel original. Resize first, then convert, for the smallest honest file.
- Spot check skin tones and gradients. Skies and faces are where compression shows first. If those look clean at full size, the rest of the photo will too.
A worked example
A food blogger publishes recipes with six photos each, averaging 900 KB as JPG, and her recipe pages feel sluggish on phones. She converts the photos here: each comes back as WebP at around 580 KB with no visible difference, her page weight drops by a third, and her mobile PageSpeed score moves from orange to green.
Have graphics with transparency instead? The PNG to WebP converter handles those, and the Image Converter covers JPG, PNG and WebP in every direction.