CleanorTools
Convert

PNG to WebP

Details

How to use PNG to WebP

What the tool does, how to run it, and what to expect from the result.

How to convert PNG to WebP

Converting a PNG to WebP re-encodes the image in your browser, keeping the alpha channel intact. That is the whole point: transparency survives, and the file is a fraction of the size the PNG was.

The quality slider controls how much is discarded. Flat graphics and logos tolerate lower settings than photographs, and a phone photo is worth comparing against a well-tuned JPEG before you commit.

  • Drop the .png file in, or click the dropzone to choose it
  • The output is already set to WebP
  • Set the quality: 92 is the default, and most images hold up at 80
  • Export the WebP locally, with nothing uploaded

Why convert PNG to WebP

WebP was built for the web and usually produces much smaller files than PNG at a similar visual quality, which means faster page loads and lower bandwidth. It also supports transparency, so it is a strong replacement for transparent PNG assets.

This is a common step when optimizing a website or app, where large PNG icons, illustrations, and screenshots slow the page down more than they need to.

  • You are optimizing images for a website or app
  • A large transparent PNG needs to be lighter
  • You want modern format support with smaller files

Balancing size and quality

WebP supports both lossy and lossless modes. The quality slider controls the trade-off, letting you shrink the file while keeping it visually clean.

The PNG is re-encoded as WebP directly in your browser, so the process stays fast and private, and transparency is preserved.

Tips

Getting a better result out of PNG to WebP

Specific settings and thresholds, not general advice.

  • WebP keeps a real alpha channel, so a transparent PNG stays transparent at a fraction of the size. That combination, transparency plus small files, is the whole reason to do this.
  • Our own format benchmark measured AVIF at 37% smaller than JPEG at matched quality, with WebP between the two: a large improvement on PNG, which is lossless and stores everything.
  • The quality slider starts at 92. WebP holds up well down to 80 on most images, and a logo or flat graphic can go further before anything shows.
  • Watch out on phone photos. Our compression study found WebP can actually backfire on them, landing no smaller than a well-tuned JPEG, so compare rather than assume.
  • Check the destination first. Every current browser takes WebP, but email clients, some marketplaces and older desktop software still refuse it, which is the one case for staying with PNG.
Limits

What PNG to WebP does not do

The honest boundary, so you do not lose time finding it yourself.

  • It does not work everywhere PNG does. Email clients and some older software still reject WebP.
  • Lossy WebP is not reversible. Keep the PNG if you may need to edit again from a clean source.
  • It does not resize or crop.
  • It converts a still image, not an animation.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Files & formatsWebPWebP (.webp) is a modern Google image format that supports both lossy and lossless compression, transparency, and animation in one file. It produces noticeably smaller files than JPEG or PNG at similar quality, so it is widely used on the web and increasingly on Android.GeneralAndroidPhotos & videoScreenshotA screenshot is an image captured of whatever is on your screen, saved into your photo library like a regular picture. Individually small, screenshots accumulate fast and clutter the camera roll because most are saved once and never needed again.iOSAndroidGeneral
At a glance

Who PNG to WebP is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Developers, designers, and site owners who want lighter, web-optimized images

Ideal for

Shrinking PNG assets into modern WebP for faster page loads while keeping transparency

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

How do I convert PNG to WebP for free?

Upload the PNG above, set the quality you want, and download the WebP. It is free and runs locally in your browser.

Does PNG to WebP keep transparency?

Yes. WebP supports an alpha channel, so transparency from the PNG is preserved.

How much smaller will the WebP be?

It depends on the image, but WebP is usually significantly smaller than PNG at a similar quality, especially for detailed graphics.

Is the file uploaded to a server?

No. The conversion happens in your browser and the image stays on your device.

Does WebP keep the transparency from a PNG?

Yes, fully. WebP carries a real alpha channel, so soft edges, feathering and drop shadows survive, and the file is a fraction of the size the PNG was. That is the main reason to make the switch.

How much smaller will the WebP be?

Substantially for most images. Our own format benchmark measured AVIF at 37% smaller than JPEG at matched quality, with WebP sitting between the two, and PNG is lossless so it stores everything and stays large.

Is WebP always the better choice?

No. Our compression study found WebP can backfire on phone photos, landing no smaller than a well-tuned JPEG. Compare the result rather than assuming, especially on camera images.

Do all browsers support WebP?

Every current one does. The gap is elsewhere: email clients, some marketplaces and older desktop applications still refuse it, and that is when a PNG or JPG is still the right file to hand over.

What quality should I use for WebP?

The slider starts at 92, which is conservative. Most images hold up at 80, and flat graphics or logos can go lower still before anything becomes visible.

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