PNG to WebP
Convert PNG to WebP in your browser
Click or drop an image hereChoose an image
About PNG to WebP
PNG to WebP converts a PNG image to WebP and keeps its transparency, since WebP has an alpha channel like PNG. Two modes are offered. Lossy WebP, with a quality from 1 to 100 (80 to start), suits photos and large pictures. "Lossless" keeps an opaque image as your browser displays it and suits screenshots, logos, and flat graphics; partly transparent pixels can shift slightly, more so the more transparent they are. The page shows both sizes in KB after converting. An animated PNG gives its first frame only, and a note says so. Safari and the other browsers on iPhone and iPad have no WebP encoder, so libwebp in WebAssembly is used there.
How to convert PNG to WebP
- 1Select the PNG, for example a screenshot or a logo, in the upload area.
- 2Check "Lossless" for graphics, or leave it off and set "Quality".
- 3Click "Convert" and check the KB figures for the PNG and the WebP.
- 4Click "Download"; the WebP keeps the name of your PNG.
Formats and limits
- Input format
- PNG (.png), one file
- Output format
- WebP with transparency, lossy or lossless
- Largest image
- 268 MP on a computer, at most 16,383 px per side
- On iPhone and iPad
- libwebp encodes the whole image in memory; 48 MP is the largest image size confirmed on a real iPhone
Where your file is processed
The PNG is read and the WebP written inside your browser. Lossless files, and every WebP made on Safari, iPhone, or iPad, come from libwebp, which your browser fetches from our site once. The image itself is never sent. A failed conversion (an encode error, an unreadable file, or a picture over the size limit) sends us its cleaned error wording along with the tool's name and your browser's name and version.
Frequently asked questions
Does the WebP keep the transparent background?
Yes. Transparent and half-transparent pixels of the PNG stay transparent in the WebP, in both lossy and lossless mode, so a logo on a transparent background can be placed on any color.
Is lossless mode an exact copy of the PNG?
Yes for an opaque image: every pixel is identical to the PNG as your browser displays it. Partly transparent pixels pass through the browser's canvas and can change slightly; the nearer to fully transparent, the larger the change.
Why does my PNG fail to convert?
It is too wide, too tall, or too large. 16,383 pixels is the longest side WebP allows, so a longer PNG is refused with a message; on a computer, an image above 268 MP is too large for a browser to process.
Tips and tricks
- ✓Lossless mode keeps the text of a screenshot exactly as it is; compare its KB figure with a lossy try before choosing.