WebP to PNG Converter

WebP is the image format Google introduced in 2010 and most websites now serve, because it makes pictures smaller than JPG or PNG at the same visual quality. That is great for loading pages and awkward for everything else: when you save an image from a website you often get a .webp file, and plenty of software — older image editors, office documents, print shops, upload forms — still refuses it. PNG is the universally accepted alternative, and this tool turns one into the other.

The conversion is done by your browser. It decodes the WebP with its own built-in WebP decoder, draws the pixels onto an invisible canvas, and encodes that canvas as PNG. PNG is lossless, so every decoded pixel is written exactly as it came out of the WebP — including its transparency, which is why PNG (not JPG) is the right target when the image has a see-through background, like a logo or a cut-out product shot. Nothing about the picture is recompressed or "improved"; if the WebP was lossy, the PNG is a perfect copy of that lossy image, not a restoration of the original.

Expect the PNG to be bigger than the WebP, often several times bigger for photos. That is not the converter being wasteful: lossless storage of a photographic image simply costs more bytes than WebP's compression. If you need a small file rather than a compatible one, convert to JPG instead, or compress the image after converting.

Every step runs locally. The file is read into your browser's memory, converted there, and offered back as a download — it is never sent to a server, which you can confirm in the Network tab of your browser's developer tools: no request carries your file. That matters when the image is a screenshot of a bank statement or a scan of an ID, which is exactly the kind of file people convert without thinking about where it goes.

1. The file's first bytes are checked for the WebP signature — the text RIFF, a four-byte length, then WEBP — so a file that is really a JPG or PNG with a .webp name is caught and named, instead of failing later with a vague decode error. 2. For WebP files with an extended (VP8X) header, the animation flag is read; if set, you are told that only the first frame is converted, because PNG here is a still image. 3. The browser decodes the image (createImageBitmap) and draws it onto a canvas at its full original size — no resizing, no smoothing. 4. The canvas is encoded with canvas.toBlob("image/png"). PNG compression is lossless, so the pixel values, alpha included, are preserved exactly. 5. The output keeps the original file name with the extension changed to .png. With several files you can download each one or all of them together as a ZIP built in the browser.