Convert PNG to WebP
Unlike converting to JPG, this one keeps transparency intact — WebP has its own alpha channel, same as PNG. The question is not whether you lose anything, but how much smaller the file gets.
Drag & drop PNG files here
or — you can paste too
HEIC, HEIF, JPG, PNG, WebP, GIF, BMP · up to 40 images
PNG is lossless — quality affects JPG and WebP only.
Why this pair is different from PNG to JPG
The usual problem with converting a transparent PNG is that the destination format has nowhere to put the transparency. JPG solves this by throwing it away — transparent pixels become solid white or black depending on the converter. WebP does not have that problem: it supports an alpha channel exactly like PNG does, so transparent and semi-transparent pixels come through unchanged. We verified this directly rather than assuming it — converting a transparent logo through this tool and checking the actual pixel data afterward showed the same transparent corner pixel, untouched, on the other side.
So the decision here is not "do I keep transparency" the way it is with JPG. It is purely about file size, and that answer depends heavily on what the PNG contains.
What actually happens to the size
Measured with this tool, at quality 80:
| What the PNG contains | PNG source | As WebP | Result |
|---|---|---|---|
| Photograph saved as PNG | 271 KB | 16 KB | 94% smaller |
| Transparent logo | 9.2 KB | 8.6 KB | 6% smaller |
| UI screenshot, flat colour | 7.5 KB | 8.3 KB | 10% larger |
If the PNG holds a photograph, this is a huge win — the same pattern as PNG to JPG, for the same reason: PNG stores every pixel exactly, and a photograph has almost no repeated pixels for that lossless approach to compress.
If the PNG already holds flat-colour graphics — a screenshot, an icon, a simple logo — the saving can be small, or WebP can even come out slightly larger than an already-optimised PNG at this quality setting. That is a real, measured result, not a rounding error: a PNG that some other tool already optimised well does not always have room left to shrink. Pulling the quality slider down recovers a real saving in that case, at some cost to crispness on sharp edges.
Metadata
Exif data is not carried into WebP output here. The metadata-preservation feature on this site targets JPG specifically, where the Exif container is standard and universally read. If keeping capture date or camera information matters, keep a copy of the original file, or convert to JPG instead if the source is a photo.
Related conversions
Common questions
Does converting PNG to WebP keep transparency?
Yes. WebP supports an alpha channel the same way PNG does, so transparent and semi-transparent areas come through unchanged. We checked this by inspecting the actual pixel data of a converted transparent logo, not just the file size.
Will my PNG get smaller as WebP?
It depends on what the PNG contains. A photograph saved as PNG shrinks dramatically — in our test, 271 KB became 16 KB. An already-optimised screenshot or flat-colour graphic may barely change, or even come out slightly larger at high quality, because there is less room left to save.
Why is my screenshot bigger as WebP than it was as PNG?
Because the source PNG was likely already well compressed by whatever tool saved it, and at quality 80 WebP is not necessarily smaller for flat colour and sharp edges. Lowering the quality slider will usually recover a real saving if size matters more than crispness here.
Does this keep my photo's metadata?
No. Metadata preservation on this site applies to JPG output only. If you need capture date or camera information kept, convert to JPG instead or keep the original file.
Will converting change the image dimensions?
No. The pixel dimensions stay exactly the same; only the encoding changes. This tool does not resize images.