Convert PNG to WebP
To convert PNG to WebP, add your .png file below and press the button: it's processed on your own device and you download the result, with nothing uploaded. It's free, needs no account, and works with files up to 500MB.
Tip: add several files at once to convert them in one go and download them as a ZIP.
About converting PNG to WebP
PNG (.png) files can be converted to WebP entirely in your browser — no software to install, no file upload, and no account required. The conversion runs on the browser's own Canvas API directly on your device.
Technical comparison
| PNG | WebP | |
|---|---|---|
| Category | image | image |
| Compression type | Lossless (DEFLATE) | Lossy or lossless (configurable) |
| Typical file size | Moderate — larger than JPEG for photos, smaller for flat-color graphics | Small — often 25–35% smaller than an equivalent JPEG |
| Transparency support | Yes (full 8-bit alpha channel) | Yes (full alpha channel) |
How to convert PNG to WebP privately
Every step below runs on the browser's own Canvas API inside this browser tab. Your .png file is never uploaded to a server — there's no network request carrying it anywhere.
Add your PNG file
Drag and drop, or click to select, a file (.png). It's read straight from disk into browser memory — no upload step exists.
Convert locally
FreePrivateConvert converts it to WebP using the browser's own Canvas API, entirely within this browser tab.
Download the result
Save your converted .webp file. It only ever existed in this tab's memory — closing the tab without downloading discards it completely.
Convert PNG to WebP with ffmpeg (command line)
Prefer the terminal? This page uses your browser's built-in image engine; the equivalent ffmpeg command is:
ffmpeg -i input.png -c:v libwebp -quality 90 output.webp- -i input.png
- Your PNG file.
- -c:v libwebp
- Encode the image as WebP.
- -quality 90
- WebP quality 90 out of 100.
- output.webp
- The WebP file to create. ffmpeg picks the container from this extension.
Don't have ffmpeg installed? You don't need it: use the converter at the top of this page. It runs this conversion on your own device, and your file is never uploaded.
FAQ
- Is my file uploaded anywhere?
- No. Your file is read and processed inside this browser tab and never leaves your device. You can confirm it in your browser's developer tools: the Network tab shows no upload.
- Does converting PNG to WebP reduce quality?
- WebP here is lossy at 92% quality: usually indistinguishable from the original for photos while noticeably smaller. Transparency is kept.
- Is there a file size limit?
- Yes: 500MB per file. There's no account and no limit on how many files you convert.
- What's the difference between PNG and WebP?
- PNG (Portable Network Graphics) and WebP store data differently. PNG: lossless (DEFLATE). WebP: lossy or lossless (configurable). WebP is Google's modern image format, supporting both lossy and lossless compression plus alpha transparency and animation in one file type.
- Why convert PNG to WebP?
- Common uses for WebP: Web page hero and background images; Responsive <picture>/srcset fallbacks; Replacing animated GIFs to cut page weight. Lossy WebP typically produces 25–35% smaller files than JPEG at equivalent visual quality.
- What MIME type does a .webp file use?
- image/webp, the standard type for WebP.
- What is the ffmpeg command to convert PNG to WebP?
- Run: ffmpeg -i input.png -c:v libwebp -quality 90 output.webp. This page does the same conversion with your browser's built-in image engine, so you don't need to install ffmpeg.
Learn more: What is a WebP file
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