Convert PNG images to WebP locally - smaller than PNG, transparency preserved, no upload.
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
WebP can do what PNG does - transparency (alpha channel) - but often at a much smaller file size. For logos, graphics and screenshots with a transparent background, WebP is the more modern successor that noticeably cuts web load times.
The PNG is painted onto a local canvas and encoded as WebP; the alpha channel is preserved (no white background, unlike ->JPG). The quality slider controls compression.
The conversion happens entirely in the browser - no upload, even offline. Your images stay on your device.
WebP is displayed by all current browsers today, which makes it the obvious choice for making heavy PNG graphics lighter on a website without giving up transparency or sharpness. For an archive, or to hand files to programs that only understand PNG, you are better off keeping the lossless original. The slider lets you find the point where the file gets small while fine edges still stay clean.
| Input formats | PNG |
|---|---|
| Output format | WEBP |
| Batch processing | Yes |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: WebP here is lossy; for strictly lossless graphics, PNG remains the safe choice. Transparency is preserved. Very old programs may not open WebP.
Yes, WebP supports an alpha channel - unlike JPG.
No, everything runs locally in the browser.
Because the file gets much smaller: even lossless WebP is around 26 percent smaller than PNG according to Google's measurement, and the lossy mode used here usually saves far more on photos and screenshots. Transparency is kept along the way. Only when every pixel nuance must count do you stay with the PNG original.
WebP has both modes; this tool uses the lossy one - it delivers the small files WebP is chosen for. Fine edges stay clean at high quality; if you need guaranteed pixel-identical graphics, keep the lossless PNG original.
Yes, download individually or as a ZIP.