ZuffSuite
Start free

Image conversion · Free

PNG to WebP Converter

Convert PNG graphics and screenshots to WebP for websites and apps. Adjust quality, preserve transparency and dimensions, and check the real output size before saving.

Drop PNG images here

PNG · transparent pixels stay transparent

Files never leave your device

  • Files stay on your device
  • No account or email
  • No watermarks
  • Free, no daily limits

Built with open-source software. Open-source notices

How to use the PNG to WebP converter

  1. Step 1

    Add PNG images

    Choose one image or a batch. The original files stay on your device and are not changed.

  2. Step 2

    Adjust WebP quality

    Move the quality control to balance file size and detail. The browser canvas encoder makes lossy WebP; a lossless mode is not offered because browser support is not consistent.

  3. Step 3

    Review and download

    Check the actual size change for each image, then save individual WebP files or a ZIP.

WebP for graphics

WebP can store transparency and often makes web graphics smaller than PNG. Results depend on the artwork and quality setting, so compare the measured output rather than expecting a fixed reduction.

The converter keeps the source pixel dimensions and alpha transparency. It uses the image encoder built into your browser and does not upload the PNG.

Lossless versus quality-based WebP

WebP defines both lossy and lossless encodings, but the standard browser canvas encoder used here exposes a quality value rather than a reliable lossless switch. This tool therefore labels the control as quality and does not promise pixel-exact output.

If you need the original PNG pixels unchanged, keep the PNG. If the WebP result is larger, the size comparison tells you so before download.

Questions about PNG to WebP

Are my files uploaded to a server?

No. This tool runs entirely in your browser: your files are read and converted on your own device and are never sent to ZuffSuite. The page downloads the conversion code it needs, then works on the files locally. Closing or reloading the tab discards everything.

Does PNG to WebP keep transparency?

Yes. The browser canvas writes PNG alpha into WebP output, so transparent regions remain transparent.

Is this a lossless WebP converter?

No. The browser canvas encoder provides adjustable quality but does not expose a dependable lossless setting across browsers. The output may change pixels.

Will every PNG become smaller?

No. The result depends on the source artwork and quality. ZuffSuite shows the measured size change, including when WebP is larger.

What happens to image dimensions?

The converter keeps the input width and height. It does not resize the PNG.

Related free tools

All free tools
JPG to WebPMake website-ready WebP copies and measure the size change.Open tool WebP to PNGKeep transparent backgrounds when a WebP won't open.Open tool Compress ImageHit a target like 100 KB with a before-and-after preview.Open tool Resize ImageExact pixels, presets like 1920 × 1080, and a live framing preview.Open tool