Convert a WebP to a PNG on your Mac
Drag the WebP files into Images by Edmund, choose PNG and press Export. This is the conversion people usually want because something they need to open the file in will not accept WebP. Transparency comes through untouched, and the resulting PNG is compressed properly rather than just written out.
macOS 15 or later. Apple silicon Mac. Version 1.1.0, out 11 October 2026. What’s new.
Free, with nothing to unlock and no account.
Convert one right here
Drop a WebP in and get a PNG back, transparency and all. It happens in this tab, on your own machine: nothing is uploaded.
WebP to PNG, step by step
- Drag the WebP files inOften these are images saved from a web page, so there may be a lot of them with unhelpful names. The whole folder can go in at once.
- Choose PNGThere is nothing else to decide unless you also want to resize. PNG keeps every pixel, so what you get is exactly what the WebP decoded to.
- Press ExportIf the WebP was lossy, the PNG will be larger, which is expected. The app still squeezes the PNG as far as an exact format allows.
The transparent pixels survive, which is where this conversion usually goes wrong
A partly transparent image stores a colour for every pixel and a separate opacity. Many pipelines multiply the two together for convenience, and where a pixel is fully transparent that multiplication destroys the colour underneath it, permanently. You do not see it until somebody later softens an edge or composites the image onto a different background and finds a halo. macOS decodes WebP with the alpha kept separate rather than multiplied in, and the app hands those pixels to the PNG writer as they are, so nothing under a transparent pixel is lost on the way through. The PNG is then compressed with the same care as anything else the app writes: the per row filters are chosen by trying them rather than assuming, and the result goes through libdeflate at the slowest setting it has.
Why not just use a converter website?
There is a particular irony in uploading a WebP to a website in order to get away from a web format. The file came off the internet, and the fix does not need to go back there.
More usefully: images saved from web pages arrive in bulk and with junk filenames, and a converter site makes you handle each one as an individual transaction. Dragging the folder in and pressing Export once is the whole job.
Questions
Why will nothing open my WebP file?
WebP is a web format, so browsers all handle it and a lot of desktop software still does not. Older versions of Photoshop, plenty of print workflows and various upload forms will reject it, which is usually what brings people to this conversion.
Will the PNG be bigger than the WebP?
If the WebP was lossy, yes, usually by a good margin, because PNG stores every pixel exactly. If the WebP was lossless the two are closer, and which one wins depends on the picture.
Does the transparency survive?
Yes. Every transparent pixel comes out transparent, in the app and in the converter on this page. There is one difference worth knowing about if you plan to edit the PNG afterwards. The app also keeps the colour sitting underneath a fully transparent pixel, which is what gets thrown away by anything that multiplies the colour and the opacity together; the converter here draws through a browser canvas, and that is exactly what a canvas does. You would not notice until somebody later softens an edge or drops the image onto a different background and finds a halo.
Can I convert a folder of them at once?
Yes. Drag the folder onto the window and every image inside it is loaded, then one setting applies to all of them. Nothing is uploaded, so there is no per file cap.
Other things it does
There is a full list on the Images by Edmund product page, along with what else the app does.
Get Images by Edmund.
Free, and it does the other eight jobs too. Two ways to get it when it lands: the Mac App Store, or straight from here.
macOS 15 or later. Apple silicon Mac. Version 1.1.0, out 11 October 2026. What’s new.