PNG to WebP

How it works

WebP is a modern image format that usually beats PNG on file size for the same image, while keeping full support for transparency — which is why so many sites convert their PNGs to it for faster page loads. This tool converts PNG images to WebP directly inside your browser tab, using the libwebp encoder for consistent results in every browser — including Safari, where the browser's own canvas can't reliably encode WebP.

When you drop a file, Moyang reads its first bytes to confirm it's really a PNG image, then hands the bytes to a background Web Worker for decoding and re-encoding. The alpha channel is carried through untouched — transparent pixels stay transparent. Your original file is never modified, and nothing ever leaves your device.

Because everything runs locally, there's no 10-conversions-a-day limit, no 100MB cap, and no processing queue — the kind of restrictions server-based converters impose to control their hosting bill. Convert one file or fifty; once a batch is done, download every result at once as a single ZIP.

Limitations

By default this produces a lossy WebP (much smaller, visually close to the source), which is the right trade-off for photos and screenshots; pixel-perfect PNGs like icons or line art will show more visible change than a lossless re-encode would. Images over 100 megapixels aren't converted — decoding runs entirely in your browser's memory, and a file that large risks crashing the tab before it even gets to WebP encoding.

FAQ

Is this PNG to WebP converter really free?

Yes — completely free, with no file size limits, no daily quota, and no account required. All conversion happens in your browser, so there's no server cost to recoup.

Is transparency preserved?

Yes — unlike JPG, WebP supports an alpha channel, so any transparent areas in your PNG stay transparent in the converted WebP.

Why convert PNG to WebP?

WebP typically produces much smaller files than PNG for the same image, especially for photos or screenshots with lots of detail, while keeping full transparency support — a common win for faster-loading websites.

Is there a file size or batch limit?

No batch limit — convert as many files as you like. Individual images are capped at 100 megapixels, which covers even the highest-resolution phone cameras; this keeps conversion from overwhelming your browser on unusually large or corrupted files.