The converter sends the selected image to a browser Web Worker, decodes it as a bitmap, then encodes a new WebP file. You can pick one of the quality presets and optionally cap the maximum width, which keeps the aspect ratio while reducing output dimensions.
Conversion uses createImageBitmap and OffscreenCanvas in this browser, so support depends on the browser's ability to decode the input and encode WebP. The tool handles one file at a time, rebuilds the output from pixels rather than original container metadata, and does not upload the image to a server.
Common questions and answers about this topic.
No. All conversion runs entirely in your browser inside a Web Worker. Your images never leave your device.
WebP files are typically 25–35% smaller than equivalent JPGs at similar quality, and 25% smaller than equivalent PNGs while preserving transparency. This translates to faster page loads, lower bandwidth costs, and improved Core Web Vitals scores. WebP is supported by all modern browsers (95%+ global usage).
This converter strips EXIF metadata during conversion, so location coordinates, camera model, and timestamps are removed from the output. To explicitly remove metadata without converting format, use our EXIF Remover tool.