Will the transparent background survive?

Yes. Transparent and semi-transparent pixels are carried into the WebP as they are, with no white fill added, so a logo or cut-out still sits cleanly on any page colour.

How much smaller will my WebP be?

It depends on the picture. Photographic PNGs and detailed cut-outs usually shrink a lot; simple flat graphics may barely change. The exact saving is shown next to the result, so you can try another quality value before saving.

Why do I get a message that my browser cannot save this format?

Not every browser can write WebP files, even if it can display them. When yours cannot, the page tells you instead of handing back a mislabelled file. Opening the page in a current version of Chrome, Edge or Firefox usually solves it.

Do all browsers show WebP images to visitors?

Every current major browser displays WebP, on phones and desktops alike. Only very old browsers lack it, which is why some sites still keep a PNG or JPG fallback.

Can I convert a whole folder of PNGs at once?

No. One image is converted at a time, so you can judge the quality and size of each before using it. Add the next PNG when you are done with the current one.

PNG to WebP Converter with Transparency

PNG is the usual export for logos, product cut-outs, icons and screenshots, and it is heavy. On a web page, every one of those files slows the first load, especially on mobile data. WebP was built for exactly this job: it holds the same picture, alpha channel included, in noticeably fewer bytes.

Pick a quality, convert, and the page shows how much lighter the WebP is than your PNG before you save it. Width and height do not change.

Before and after

A laptop on a desk in blue light, its screen filled with lines of code in a dark editor, backlit keyboard in front — The picture and its 2400 × 3600 px size stay the same. Only the file changes: PNG at 9.35 MB in, WebP at 897 KB out.
JPG drops detail the eye barely notices, which is why the file is 91% smaller.
The numbers are from a real run of the tool above. The pictures here are smaller previews of the actual files.

The same photo saved as WebP — The picture and its 2400 × 3600 px size stay the same. Only the file changes: PNG at 9.35 MB in, WebP at 897 KB out.
JPG drops detail the eye barely notices, which is why the file is 91% smaller.
The numbers are from a real run of the tool above. The pictures here are smaller previews of the actual files.

How to use it

Choose a PNG from your phone or computer, or paste one you have copied.
Set the quality slider. 92 is the starting point; lower numbers trade a little sharpness for a smaller file.
Convert and read the size line under the result: it says how many percent smaller the WebP is, or warns that it came out larger.
Save the .webp for your site and keep the original PNG as your editable master.

Choosing a quality setting

The slider runs from 40 to 100. At 92 most photos and colourful graphics look identical to the PNG, and that is a safe value for hero images and product shots. Between 75 and 85 suits thumbnails and blog illustrations where load time matters more than fine detail. Screenshots containing small text deserve 90 or above, because lower settings soften letter edges first.

The tool uses your browser’s own WebP encoder. There is no separate lossless switch, so if you need a pixel-for-pixel copy for further editing, the PNG remains the file to keep.

When WebP is not the better choice

Flat artwork with a handful of solid colours, such as a simple icon or a diagram, is already compact as PNG. Converting it may save very little, and occasionally the WebP is the bigger file; the size comparison catches this, and in that case simply keep the PNG.

WebP is a format for web pages. Application portals that list JPG or PNG as allowed types, many email attachments viewed in older programs, and some print services still reject it. For those, convert the PNG to JPG instead.

Frequently asked questions

Will the transparent background survive?: Yes. Transparent and semi-transparent pixels are carried into the WebP as they are, with no white fill added, so a logo or cut-out still sits cleanly on any page colour.
How much smaller will my WebP be?: It depends on the picture. Photographic PNGs and detailed cut-outs usually shrink a lot; simple flat graphics may barely change. The exact saving is shown next to the result, so you can try another quality value before saving.
Why do I get a message that my browser cannot save this format?: Not every browser can write WebP files, even if it can display them. When yours cannot, the page tells you instead of handing back a mislabelled file. Opening the page in a current version of Chrome, Edge or Firefox usually solves it.
Do all browsers show WebP images to visitors?: Every current major browser displays WebP, on phones and desktops alike. Only very old browsers lack it, which is why some sites still keep a PNG or JPG fallback.
Can I convert a whole folder of PNGs at once?: No. One image is converted at a time, so you can judge the quality and size of each before using it. Add the next PNG when you are done with the current one.