- Free tools
- Image Converter
- PNG to WebP
FREE PNG TO WEBP CONVERTER
Convert PNG to WebP
A free PNG to WebP converter that runs in your browser. Drop in PNG files, set the quality, and download smaller WebP versions that keep transparency. No upload, no signup, nothing leaves your device.
- Transparency kept
- Batch convert at once
- Images never uploaded
WHY WEBP
Add images
Lower quality means a smaller WebP file. Raise it for flat graphics and logos.
Converted in your browser. Your images are never uploaded.
Results
Add a PNG to convert it to WebP, then download the new file.
HOW IT WORKS
Convert PNG to WebP in your browser
WebP gives you smaller files than PNG and, unlike JPG, keeps transparency. This tool re-encodes your PNG files to WebP on the HTML canvas, locally, so nothing is uploaded and the smaller file downloads straight away.
Drop in your PNGs
Add one PNG or a batch of files. Each one is read and decoded locally on your device, transparency and all.
Set the quality
Leave it at the default or slide it to balance size against sharpness. Resize the longest side too if you want smaller dimensions.
Download the WebP files
See the new WebP size next to the original PNG, then download each file with its transparency kept.
WHAT THIS TOOL DOES
A focused PNG to WebP converter, nothing uploaded
Everything runs on the HTML canvas in your browser, so it is fast, private and works offline once the page has loaded.
Keeps the alpha channel
WebP supports transparency, so transparent areas in your PNG stay transparent. No white box behind your logo.
Lighter than PNG
PNG is lossless and often heavy. WebP is usually smaller, especially for detailed images and screenshots.
Quality you control
Set the WebP quality, with the new size shown next to the original PNG so you can see the saving for yourself.
Resize while you convert
Cap the longest side to 1920px or any width you choose, to change format and dimensions in a single pass.
Many PNGs at once
Drop a whole folder of PNGs in together. Each is converted to WebP and downloaded one by one.
Nothing leaves your device
No upload, no account, no queue. Your images are processed locally and stay on your machine.
PNG VS WEBP
Why WebP beats PNG for the web
PNG is perfect when you need a lossless original, but it is often much heavier than it needs to be online. WebP keeps the transparency you rely on at a smaller size.
| What you get | WebP | PNG |
|---|---|---|
| File size for photos | ✓ Much smaller | Large |
| Transparency | ✓ Yes | ✓ Yes |
| Lossy and lossless modes | ✓ Both | Lossless only |
| Browser support | ✓ All current | ✓ Universal |
| Best for | Web images, logos | Masters, print, legacy |
Converting photos from JPG instead? Use the JPG to WebP converter, or the full image converter for any direction.
FAQ
PNG to WebP questions
Is this PNG to WebP converter free?
Yes. It is free with no signup, and it runs entirely in your browser, so your images are never uploaded to a server. To audit image formats and sizes across a whole site, download the free SiteAuditLint desktop app.
How do I convert PNG to WebP?
Drop your PNG files onto the tool, set the quality if you want, and download the WebP version. It is converted locally in your browser, so nothing is uploaded.
Does PNG to WebP keep transparency?
Yes. WebP supports transparency, so transparent areas in your PNG are kept in the WebP file. Unlike JPG, you do not lose the alpha channel.
How much smaller is WebP than PNG?
For photos and detailed images WebP is often far smaller than PNG, since PNG is lossless. For flat graphics and logos the saving is smaller but WebP is usually still lighter.
Do all browsers support WebP?
Every current browser supports WebP, including Chrome, Firefox, Safari and Edge. For very old browsers you can keep a PNG fallback.
Are my images uploaded anywhere?
No. Conversion happens locally in your browser using the HTML canvas, so your images never leave your device. Nothing is sent to a server and nothing is stored.
Convert one PNG here. Find oversized PNGs across your whole site with SiteAuditLint.
Heavy PNGs where WebP would do slow pages down. The free desktop crawler flags oversized images and next-gen format opportunities across every URL.
Download SiteAuditLint