WebP to JPG

How do I convert WebP to JPG?

1. Drop your .webp files onto the drop zone, or click to browse.
2. Set Quality. 90 keeps the image visually identical; 80 gives a smaller file.
3. Set Background for transparent areas if the WebP has transparency. The default #ffffff is white.
4. Click Convert to JPG.
5. Download the JPG, or Download all as ZIP for a batch.

WebP is the format most large websites now serve, so right-click and save often gives you a .webp file whether you wanted one or not. All current browsers have displayed WebP since Safari 14 in 2020, but plenty of software has not caught up: older versions of Photoshop, Microsoft Office, some email clients, many upload forms and most photo printing services still expect JPG or PNG. Converting takes a second and removes the friction.

The tool relies on your browser's own WebP decoder through createImageBitmap, running in a Web Worker. Both lossy and lossless WebP files are supported, as are WebP images with an alpha channel. The decoded pixels are drawn onto an OffscreenCanvas over the Background colour and encoded as a JPEG at the quality you choose. Animated WebP files are converted using their first frame.

Quality 90 is the default because most WebP files found online were already compressed once, at a fairly low setting, and a second lossy pass needs headroom to avoid adding visible artefacts on top of the ones already there. If the image will only be viewed on screen, 80 is fine and typically 30% smaller. Expect the JPG to be larger than the WebP either way, since WebP is roughly 25 to 35% more efficient at the same visual quality.

Because JPG has no transparency, any transparent or semi-transparent pixels in the WebP are flattened onto the Background colour. Leave it at white for product images and documents, or type the hex value of the surface the picture will sit on. If you need to keep the transparency, convert to PNG instead using Resize Image with PNG as the output format and the original dimensions.

Nothing is uploaded. Decoding, compositing and encoding all happen in your browser, and the result is handed straight back as a download. Large batches are fine; the only limit is your device's memory.

How it works: this tool uses your browser's Canvas and WebCodecs APIs, plus libheif for HEIC. No server is involved, so Kilnfile never sees your file. Last reviewed 20 September 2026.

Frequently asked questions