WebP to JPG Converter

This tool converts WebP images to JPG (also written JPEG) inside your browser, for anyone who saved a picture from a website and found that an app, upload form or print shop will not accept the .webp file. JPG is the most widely accepted photo format there is, so converting to it is the quickest way to make an image usable everywhere.

WebP is the format Google introduced so web pages load faster; Google's own figures put lossy WebP files 25–34% smaller than comparable JPGs. That is why so many images saved with right-click, Save image as arrive as .webp even when the page seemed to show an ordinary photo.

Here is what actually happens when you click Convert to JPG. The first bytes of each file are checked for the WebP signature (RIFF…WEBP), so a file that is really a PNG or JPG with the wrong name is identified instead of failing with a vague error. Your browser then decodes the WebP with its built-in decoder, paints your chosen background colour onto a canvas the same size as the image, draws the image on top, and encodes the canvas as JPG at the quality you set — 92 out of 100 by default.

Two things are lost, and you should know which. First, transparency: JPG has no alpha channel, so every transparent or semi-transparent pixel is blended onto the background colour (white unless you pick another). If your WebP is a logo or cut-out with a see-through background that you need to keep, convert WebP to PNG instead. Second, JPG compression is lossy: each encode discards some fine detail. At quality 92 the difference is very hard to see; at 60 you will notice blocky artefacts around sharp edges and text. The JPG will usually be larger than the WebP, because JPG compresses less efficiently — that is the price of compatibility. Animated WebP files keep only their first frame, and the tool tells you when that happens.

Everything runs locally. Files are read into your browser's memory and converted there; they are never sent to a server. You can check this yourself in your browser's developer tools under Network: no request carries your image (the page itself loads normally, including anonymous analytics). You can convert up to 50 files at a time, each up to 50 MB, and download them one by one or together as a ZIP.

1. Each file's first bytes are read and checked for the WebP signature — "RIFF", a four-byte length, then "WEBP". A file with a different signature is rejected with a message naming its real format. 2. For WebP files with an extended (VP8X) header, the animation flag is read; if it is set, you are told that only the first frame will be converted. 3. The quality (1–100) and background colour (a hex value) are validated; quality is converted to the 0–1 scale the browser encoder uses. 4. The browser decodes the image (createImageBitmap) at its full size. A canvas of the same width and height is filled with the background colour, and the image is drawn over it, so transparent pixels blend onto that colour. 5. The canvas is encoded with canvas.toBlob("image/jpeg", quality). The file keeps its original name with the extension changed to .jpg.