Convert PNG to WebP
Drop a PNG and download it as a WebP, converted in your browser.
Your workspace Convert · Preview · DownloadPrivate by default
Runs on this device. The first use downloads a 56 to 135 MB model once. Nothing is uploaded.
This browser did not name the format it opened.
- Open a photoDrop, paste or choose one.
- Set the sizeType it, or pick a common size.
- DownloadSee the file size before you save.
Processed on your deviceNo watermark. No signup.
WebP keeps transparency, as PNG does, and usually needs fewer bytes to do it. Nothing is uploaded, no account is needed, and the width and height stay the same. It suits a web page rather than a form.
Why make this conversion?
WebP can preserve transparent areas while using lossy compression for the colour data. That makes it an option for graphics and photos when the destination supports it.
Compare the preview and file size; PNG may be preferable when exact text and edge pixels matter.
How much does the file size change?
We saved the same seven images, five photographs and two graphics, as PNG and as WebP with this converter, at its default quality of 82. Only the format changed.
PNG has no quality setting: it keeps every pixel, which is why its files are so large.
| Image | PNG (KB) | WebP (KB) | Change |
|---|---|---|---|
| Waterfall in forest | 12,754 | 903 | -93% |
| Cityscape with signage | 21,421 | 1,075 | -95% |
| Sunflower, blurred background | 7,588 | 268 | -96% |
| Mountain range and sky | 10,177 | 467 | -95% |
| Waterfall, close crop | 2,699 | 274 | -90% |
| Screenshot of a web page | 131 | 34 | -74% |
| Share card with text | 109 | 24 | -78% |
On the five photographs, WebP came out 90 to 96 percent smaller than PNG.
How close each format stayed to the original is in JPG vs PNG vs WebP vs AVIF, measured.
A conversion never improves a picture
Changing the format changes how the pixels are stored, not what they show. Detail an earlier save discarded is gone, and no later format can work out what used to be there.
If the original file still exists, convert from that instead.
Where it does matter is the order of the work. Resize and crop first, convert last.
Every save to a lossy format costs a little quality, so the fewer round trips a file makes, the better it looks when you are finished.
What happens to your photo?
Your selected photo is processed in your browser, without an image upload to a server. The page may download code and codecs needed for editing.
Save your result before closing the tab; unsaved edits are kept in memory rather than in an online account.
Common questions
Does WebP keep a transparent background?
Yes. WebP carries an alpha channel in the same way PNG does, so a logo with a transparent background stays transparent.
That is the main reason to choose it over JPEG whenever the image is not a photograph.
Is the WebP this tool writes lossy or lossless?
Lossy, with the quality control in the panel deciding how lossy. That is what makes the file smaller than the PNG.
For a screenshot where every pixel has to survive exactly, PNG remains the safer choice.
Last updated: