JPG to WebP Converter

A jpg-to-webp converter re-encodes a JPEG photograph into Google's WebP format, which typically produces files that are 25–35% smaller at the same visual quality. For any site that serves a lot of photography, this is one of the highest-impact optimisations available: every converted image loads faster, uses less bandwidth, and improves Core Web Vitals scores — especially on slow mobile connections.

The conversion works entirely inside your browser. When you pick a file, the tool reads the JPEG using the browser's createImageBitmap API to decode the pixel data. It then draws those pixels onto an off-screen HTML canvas and calls canvas.toBlob with the mime type 'image/webp' at whatever quality level you set on the slider (10–100). The resulting blob is turned into a local object URL so you can preview and download it. Nothing is ever sent to a server or stored anywhere outside your browser tab.

Here is a concrete example: a 2.4 MB JPEG holiday snapshot converted at quality 85 will typically come out around 1.6 MB — roughly a 33% reduction that is indistinguishable from the original on a phone or tablet display. Dropping quality to 75 can push the same image below 1 MB while still looking sharp in a product gallery or lightbox. The result panel shows the output file size immediately so you can dial in the right quality-versus-size trade-off before downloading.

One thing worth keeping in mind: JPEG is already a lossy format, so converting JPG to WebP applies a second round of lossy encoding. To avoid visible artefacts, always start from the highest-quality JPEG you have and keep the WebP quality at 80 or above for the first conversion.