PNG to WebP

About PNG to WebP

Convert PNG to WebP online to cut image file size for websites while keeping transparency. WebP supports an alpha channel, so logos, icons, and screenshots with transparent backgrounds stay transparent, and the files are often much smaller than the original PNGs. This tool converts PNG images to WebP in your browser, with a quality slider from 10% to 100% to control compression. You can convert up to 20 PNG files at once, and each result shows the original size, new size, and percentage change, so you can see exactly how much you saved before downloading.

How to use

1. Click the "Drop PNG files here" area or drag PNG files onto it. Files you add later join the list, up to 20.
2. Adjust the Quality slider (10-100%, default 90%) to balance WebP file size against image detail; the listed files are converted again with the new setting.
3. Wait for "Converting X / Y..." to finish, then check each file's original size, new size, and percentage change.
4. Click Download next to each converted WebP file to save it, or click Download all to get every file in one ZIP.
5. Click ✕ on a row to remove that file, or CLEAR to empty the list.

Limitations & notes

• New files are added to the list rather than replacing it; the list holds up to 20 files and any extras are skipped.
• Changing Quality re-converts the files already in the list; the old results are dimmed and cannot be downloaded until it finishes.
• WebP export depends on your browser; if it is not supported, an error is shown instead of a file.
• Files that are not PNG, whether picked or dropped, are skipped and named in a notice.
• Images over about 16,000 pixels per side show an "Image too large" error; some phones have a lower limit.

FAQ

Does WebP keep PNG transparency?

Yes. WebP supports transparency, so transparent areas in your PNG stay transparent in the WebP file.

Is the WebP output lossless?

No. This tool exports lossy WebP using the Quality setting, so some detail may be lost. At 90% or higher the difference is usually hard to see.

Why did I get an error saying WebP export is not supported?

Some browsers can display WebP but cannot create WebP files from a canvas. Try a current version of Chrome, Edge, or Firefox.

Can I convert several files at once?

Yes. Drop or select several files; files you add later join the list instead of replacing it, up to 20 in total. Each one gets its own Download button and a ✕ to remove it, and Download all saves them together as one ZIP. Files beyond 20 are skipped and a notice says how many.

Are my images uploaded to a server?

No. The conversion runs in your browser using the HTML canvas, and the converted file is created on your device. Nothing is sent to a server.