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PNG to WebP Converter
Convert PNG to WebP to shrink images for your website without losing transparency. Conversion runs in your browser and nothing is uploaded.
Your images never leave your device
How to use PNG to WebP
- Drop your PNG files on the page or pick them from your device.
- Wait while each file is converted to WebP on your device.
- Download the WebP files one by one, or all together as a zip.
Frequently asked questions
Does PNG to WebP keep transparency?
Yes. WebP supports a full alpha channel, so transparent backgrounds and soft edges carry over, which is the main reason to prefer it over JPG for graphics.
How much smaller will the WebP be?
It depends on the image. Photographic PNGs often shrink dramatically, while simple graphics and screenshots shrink less. Add a few files and compare sizes to see what you save.
Is it safe to replace my PNG files with WebP on my website?
For browsers, yes: all current browsers support WebP. Keep the original PNGs, though, for editing and for places that may not accept WebP.
Are my PNG files uploaded anywhere?
No. The conversion runs in your browser using WebAssembly, so your PNG files stay on your device. There is no signup, no watermark and no cost, and you can convert a whole batch and download it as a zip.
About PNG to WebP
Unoptimized PNGs are one of the most common reasons web pages are slow. WebP covers the same ground as PNG, including full transparency, in a noticeably smaller file, so converting is a standard step when speeding up a site. Photographic PNGs shrink the most, since they have no flat areas for PNG's lossless compression to exploit, while simple graphics shrink less.
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Unlike JPG, WebP will not turn your transparent backgrounds white. That makes it the right replacement for PNG logos, icons and product cut-outs that must sit on any background color.
WebP can compress an image either losslessly or with some loss, so the exact trade-off depends on the picture, and fine details such as small text deserve a look at full size before you replace your originals. The size reduction varies with the content: photographic images drop a lot, flat graphics less. Transparency, including soft semi-transparent edges, is preserved. Metadata is removed. Every current browser displays WebP, but some older desktop programs, email tools and upload forms do not.
PNG is lossless, so no detail is ever discarded; WebP is either lossy or lossless, depending on how the file was saved. Both formats can store transparency, so transparent areas in the PNG file stay transparent. For scale, a 12-megapixel photo is typically 15 to 25 MB as PNG and 1.5 to 3.5 MB as WebP. Compatibility: Every current browser displays it. Some older desktop software, email clients and upload forms still reject it.