JPG to WebP Converter

Start by uploading a JPEG or JPG image, and the converter handles the rest without sending anything to a server. Step one decodes your image file using the browser's native image loading API, which supports standard JPEG baseline and progressive encoding. Step two draws the decoded image to an off-screen HTML canvas at its original dimensions. Step three exports the canvas as a WebP blob using the quality value you set, which maps directly to the quality parameter in the WebP encoding pipeline. A quality of 85 is a reliable starting point for most photos — it achieves meaningful file reduction while preserving most of the visible detail. Step four generates a download link for the WebP file.

WebP uses predictive coding and entropy compression that typically reduces JPEG file sizes by 25–34% at equivalent perceived quality. The tradeoff is that some older browsers and apps still prefer JPEG, so check downstream compatibility before switching entirely. Transparent JPEG images don't exist by definition, so the canvas export always produces an opaque WebP without an alpha channel.

Practical tip: if you're optimizing product or editorial photos for web use, target quality 80–85. It hits the sweet spot between size savings and sharpness at typical viewport sizes. All processing happens locally in your browser. Files are never uploaded to our servers.