Convert WebP to JPG
Saved an image from the web and nothing will open it? It is probably WebP. Convert it to JPG here, in your browser, with nothing uploaded.
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Nothing here is uploaded. Disconnect from the internet and the page keeps working.
Why you keep running into WebP
WebP is Google's image format. It produces files roughly a quarter to a third smaller than JPEG at the same visual quality, so websites adopted it quickly — which is why the image you just saved from a web page is a .webp file.
Every current browser displays it. Plenty of other software still does not: older versions of Photoshop, many printing services, some upload forms, older Office builds, and a good deal of embedded and industrial software. Converting to JPG is usually the fastest way past that wall.
What you give up
The file will get bigger — usually 25 to 40 percent — because JPEG is simply a less efficient format. And WebP supports transparency while JPEG does not, so any transparent area becomes white. If the destination can handle PNG, converting to PNG instead keeps transparency, at the cost of a considerably larger file.
The conversion re-encodes the picture, so it is technically lossy. At quality 90 the difference from the WebP original is not visible at normal viewing size.
Animated WebP
WebP can hold animation, like a GIF. Browsers can only hand a single frame to a canvas, so an animated WebP converts to a still image of its first frame. There is no way around this in a browser-based tool, and it is better to say so than to let you discover it after processing forty files.
Questions
+ Why will my computer not open a .webp file?
The software you are using predates the format or never added support. Any current browser will display it — dragging the file into a browser tab is the quickest way to view one without converting it.
+ Will the JPG be bigger than the WebP?
Usually yes, by roughly a quarter to a third. WebP is a more efficient format, and that efficiency is what you trade away for compatibility.
+ Does it keep transparency?
No — JPEG has no transparency, so transparent areas become white. Convert to PNG instead if you need to keep it.
+ What about animated WebP files?
Only the first frame is converted. Browsers expose a single frame to the canvas, so animation cannot be preserved here.
+ Is anything uploaded?
No. The conversion happens in your browser and no file leaves your device.