Is my PNG uploaded to convert it?

No. The conversion runs in your browser using WebAssembly and canvas APIs, so the image data never leaves your device. There is no upload endpoint in this application at all — you can watch the network tab while you convert.

Does WebP keep the transparent background?

Yes. WebP has a full alpha channel, so transparency is preserved exactly and you are not asked to pick a background colour.

How much smaller will the WebP be?

For graphics and screenshots, often half the size or better. The result panel shows the measured saving for your file rather than a generic claim.

Is WebP lossless like PNG?

This tool encodes lossy WebP, which is what makes it so much smaller. At quality 85 or above the difference on flat graphics is very hard to see. Keep the PNG as your master copy.

Convert PNG to WebP

WebP keeps the transparency PNG gives you while producing a far smaller file. Convert here without uploading anything.

Free
No signup
No watermark
Files stay on your device

Drop an image hereor browseJPEG • PNG • WebP • AVIF where supported

Processed locally

Your image never leaves your computer.

How to convert png to webp

1
Choose your PNG
Drop the PNG onto the page, or browse for it.
2
WebP is already selected
Set the quality. Transparency is carried across automatically.
3
Convert and download
Press Convert image and check the measured size saving.

The best of both formats

PNG's advantage is the alpha channel; its cost is size. WebP supports the same transparency but compresses far more aggressively, which is why it usually wins for logos, illustrations, icons and UI screenshots destined for the web.

Reductions of 50% or more against a PNG are common, and unlike PNG-to-JPG you do not have to flatten the image onto a background colour first.

When to stay with PNG

The file is going into software that will not read WebP.
You need a pixel-exact archival master and cannot accept a lossy step.
The image is tiny already — a 3 KB icon has nothing left to save.

Frequently asked questions

Is my PNG uploaded to convert it?: No. The conversion runs in your browser using WebAssembly and canvas APIs, so the image data never leaves your device. There is no upload endpoint in this application at all — you can watch the network tab while you convert.
Does WebP keep the transparent background?: Yes. WebP has a full alpha channel, so transparency is preserved exactly and you are not asked to pick a background colour.
How much smaller will the WebP be?: For graphics and screenshots, often half the size or better. The result panel shows the measured saving for your file rather than a generic claim.
Is WebP lossless like PNG?: This tool encodes lossy WebP, which is what makes it so much smaller. At quality 85 or above the difference on flat graphics is very hard to see. Keep the PNG as your master copy.