PNG to WebP Converter
WebP is the format to reach for when a PNG is slowing a page down. It keeps transparency and is usually much smaller than the equivalent PNG. Convert one image or a whole batch at once: your browser does the encoding on your device, so nothing is uploaded.
Drop PNG images here
Or paste with Ctrl+V (Cmd+V on a Mac). Accepts PNG, JPG, JFIF, WebP, AVIF, HEIC, GIF and BMP. Nothing is uploaded.
How to convert PNG to WebP
- Add your PNGs. Drop in one image or a batch, click Pick files, or paste a screenshot with Ctrl+V (Cmd+V on a Mac).
- Set the quality. Lower quality means a smaller file. Around 80% suits photographs; keep 90% or more for screenshots with small text.
- Convert and download. Click Convert, check each file's size before and after, then save them individually or as one ZIP.
PNG and WebP compared
| Feature | PNG | WebP |
|---|---|---|
| Transparency | Yes, full alpha channel | Yes, full alpha channel |
| Animation | Only as APNG; most editors show one frame | Yes |
| Compression | Lossless | Lossy or lossless |
| Typical file size | Large for photos, compact for flat graphics | Often 25 to 35% smaller than JPG at similar quality |
| Support | Universal | All current browsers; most up-to-date apps |
| Best for | Screenshots, logos, images you will edit | Images on websites |
Things worth knowing
- Transparency survives the conversion: WebP has an alpha channel just as PNG does.
- Savings depend on the image. Photographs stored as PNG shrink dramatically; small flat-colour icons shrink less. Every file shows its size before and after.
- Safari cannot save WebP from a web page by itself, so in Safari this page uses libwebp, Google's WebP encoder compiled to WebAssembly, downloaded the first time you convert. Other browsers use their built-in encoder.
Questions people ask
Are my images uploaded anywhere?
No. Your browser decodes and re-encodes each image on your own device, so there is no server to upload to and nothing is stored. The page does fetch extra code from this site the first time you use certain features (the ZIP download, PDF output, a WebP encoder for browsers without one, and the HEIC decoder), but your images are never part of those requests.
Does converting PNG to WebP lose quality?
The quality slider controls lossy compression. At the default the difference is not visible for most images; push the slider up for fine text or sharp diagrams where artefacts would show, and keep the PNG if every pixel must survive exactly.
Will transparency be preserved?
Yes. WebP has a full alpha channel, so transparent backgrounds convert across cleanly.
Should I use WebP or AVIF?
AVIF usually compresses better but encodes slowly and has patchier support in older software. WebP is the safer default, and it is the one this tool produces.