PNG to WebP Converter
Shrink PNG graphics and screenshots by converting them to WebP. Keep transparency, choose lossy or lossless, and download the results. No upload, no sign-up.
🔒 Runs in your browser. Your files and text are not uploaded.
How to use the PNG to WebP Converter
- Drop your PNG files on the box, or click it to choose them.
- Choose the Quality for lossy WebP, or tick “Lossless” to keep every pixel exactly.
- Compare the size with the original on every row.
- Download the WebP files singly or as a ZIP.
Lossy or lossless?
| Mode | What it does | Best for |
|---|---|---|
| Lossy (quality 80–90) | Discards some detail, much smaller files, transparency is kept | Photos with transparent backgrounds, screenshots, large illustrations |
| Lossless | Keeps every pixel, usually smaller than the PNG | Logos, icons, pixel art, anything that must not change |
Google’s documentation says lossless WebP images are about 26% smaller than PNG files, and lossy WebP with transparency is typically far smaller than the same picture as a PNG. The lossless option needs a browser that can encode it, which is currently Chrome and Edge; in other browsers the file may come out lossy or the tool will say it cannot create the file.
Transparency stays intact
Unlike JPG, WebP supports an alpha channel in both its lossy and its lossless mode. Soft shadows, anti-aliased edges and cut-outs survive the conversion, which makes WebP a natural replacement for large PNG images on websites such as product cut-outs, hero graphics with transparent corners and screenshots with rounded edges. Lossy compression can create faint haloes along very high-contrast edges, so look at the result on both a light and dark background before you publish it.
When to leave a PNG alone
- Tiny icons: the saving is a few hundred bytes and not worth the compatibility risk.
- Pictures you send to people or upload to forms, which may not accept WebP. Choose JPG for photos.
- Assets for software that cannot read WebP, such as some game engines, older editors and print workflows.
Using the result on a site
Serve the WebP with a PNG fallback if your audience includes very old browsers, using the picture element described in JPG vs PNG vs WebP. Keep your original PNG as the master: you can always create new WebP files from it later, but converting between lossy formats repeatedly will degrade the picture.
Frequently asked questions
Does PNG to WebP keep transparency?
Yes, both lossy and lossless WebP support transparency.
How much smaller will the file be?
Lossless WebP is typically about a quarter smaller than the PNG. Lossy WebP can be 80% smaller or more, depending on the picture.
Why does Lossless not work in my browser?
Lossless output needs a browser that can encode it from a web page, which today means Chrome and Edge. Safari has not offered WebP encoding to web pages so far. Use Chrome or Edge for this option.
Is a WebP image safe to use on every website?
It works in every current major browser. Keep a PNG fallback only if you must support very old systems.
Are my pictures uploaded?
No. The conversion happens in your browser.