PNG to WebP Converter
Shrink PNG payloads into WebP with an adjustable quality setting.Image ToolsDrop your images here
PNG images (.png)
Up to 25 MB per file · up to 20 files
Output options
Your files are processed on this device. Nothing is uploaded to a server.
About this tool
PNG is lossless and dependable, which makes it heavy for photographs on a web page. WebP usually delivers the same visual result at a fraction of the bytes. Set a quality level, preview the resulting size, and download.
How to use the PNG to WebP tool
- Add PNG files. Drop .png files into the drop area. Multiple files are processed one after another with a shared quality setting.
- Tune quality. Start around 80%. Lower values shrink the file further; higher values keep fine detail and gradients cleaner.
- Download the WebP files. Compare the before/after size for each result, then download individually or as a ZIP.
Supported formats
Input
- PNG (.png)
- PNG with alpha transparency
- APNG (first frame only)
Output
- WebP (image/webp)
Inputs are validated before anything is processed. Invalid values and unsupported files are rejected with a clear error instead of failing silently.
Frequently asked questions
Does WebP keep the transparent background?
Yes. The canvas retains the alpha channel and the WebP encoder writes it. Transparent PNGs stay transparent in the output.
Can I produce lossless WebP?
No. Browser canvas APIs only expose lossy WebP encoding with a quality parameter; there is no standard browser API for lossless WebP. Set quality to 100% for the highest-fidelity lossy output, or keep the PNG if you need a truly lossless file.
How much smaller will my file be?
Photographic PNGs commonly shrink by 60–90% at quality 80. Simple graphics with few colours may already be smaller as PNG. The tool shows the exact before/after size for every file so you can judge the trade-off.
Which browsers display WebP?
All current versions of Chrome, Edge, Firefox, Safari and most mobile browsers. Safari added WebP support in version 14.
Privacy
Images are encoded locally. Nothing is uploaded, and no watermark is added to the output.
No account is required and no file is ever uploaded. See the privacy policy for details about analytics and the limited data this site stores.
Known limitations
- Canvas-based WebP encoding is lossy in current browsers; lossless WebP encoding is not available through a browser API.
- Animated PNG (APNG) exports the first frame only.
- Extremely large canvases are limited by the browser's maximum canvas dimensions.
Related tools
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