Convert a PNG image to a WebP copy
Convert PNG to WebP when you want to prepare a picture for a website or app that accepts WebP. The input might be a photograph stored as PNG, a product cutout or a graphic with transparent space around it.
A PNG to WebP conversion can change the file size and appearance, depending on the picture and your quality setting. It is worth checking both. A smaller file is useful only if the result still carries the detail your audience needs.
Keep your source when preparing a WebP copy, particularly when it is a logo, illustration or other asset you expect to reuse. Your WebP copy can serve a particular delivery task without replacing the original.
Convert PNG to WebP in three steps
- Add the PNG file or batch you want to process.
- Choose the WebP quality setting for your output.
- Convert, inspect your WebP result and download your copies.
The converter works in your browser and requires no account. You can add up to 30 files, with a total input size of 160 MB. An individual picture must be no larger than 40 MB and 24 megapixels.
Leave the tab open until processing is finished. If you have both photographs and text-heavy graphics, consider separate batches so you can choose settings that suit each group.
Preserve transparent space around your subject
PNG and WebP can both represent transparency. A transparent cutout can therefore remain transparent when you convert PNG to WebP, instead of gaining the solid rectangle required by JPG.
Check the result against the background where it will actually appear. Soft shadows and partly transparent edges may look different on a dark page than on a white one. Looking only at a checkerboard preview can make those details easy to miss.
If the PNG already has a solid background, conversion will keep it. The tool does not know that a white region is supposed to be empty. Use background removal first when you need to separate a subject from its surroundings.
Protect small text and graphic edges
Photographs and illustrations do not respond to compression in the same way. A photographic texture can hide a small visual change, while a thin line or tiny letter may make it obvious.
After converting, inspect labels, diagrams, icons and borders. If edges look softer than you want, increase the WebP quality or keep the PNG for that asset. A quality adjustment is a tradeoff, not a promise of identical pixels.
For a logo that must stay sharp at many sizes, remember that both PNG and WebP are raster images. Changing between them does not create vector paths or editable shapes. Use an original vector file when that is what the project requires.
Match dimensions to the destination
A large transparent canvas can increase the size of a graphic even when the visible subject is small. Crop unnecessary empty margins if the destination does not need them.
Similarly, a large PNG photograph may contain far more pixels than its final position on a webpage requires. Resize a copy deliberately, maintaining the aspect ratio, before choosing the final WebP quality.
Keep intentional padding when an asset needs room around it. Removing every empty pixel is not always the right choice for a product grid or a button icon. The useful dimensions are those that fit the design, not necessarily the smallest possible rectangle.
Keep the format change reversible
Save your original PNG and make each new WebP export from that source. This lets you try another quality setting without repeatedly recompressing a previously exported WebP.
Test the destination before converting an entire collection. A web publishing system may accept WebP, while a related marketplace, email workflow or document upload may still ask for another format.
This tool accepts still PNG images. Animated PNG inputs are not supported; export a still frame separately if that is what you need. Keep the animated source when movement is part of the asset.
PNG to WebP questions
Is PNG to WebP lossless here?
Do not assume pixel-identical output. The quality control can change visual detail. Compare the exported WebP with your PNG, especially for screenshots and line art.
Will the transparent background remain?
Existing transparent areas can be retained in WebP. Conversion does not remove a background that is already painted into the PNG.
Why is the WebP not much smaller?
The PNG may already be compact, the graphic may compress differently, or the quality setting may favor detail. There is no guaranteed reduction for every file.
Can I convert PNG product cutouts in bulk?
Yes, within the stated batch limits. Inspect fine edges and shadows on several outputs before using the batch in a product catalog.
Can I turn the WebP back into PNG?
Yes, but keep the original PNG whenever possible. Converting back does not undo detail changes introduced during the WebP export.