Can I batch convert PNGs to WebP?

Yes. Batch up to 20 PNGs, adjust quality, and download files or a ZIP.

PNG to WebP Converter — Free & Local

Q: How do I convert PNG to WebP without uploading?

Use NanoImage PNG to WebP in your browser. Files stay on your device; nothing uploads.

Q: Does PNG to WebP keep transparency?

Yes. WebP supports alpha, so transparent PNGs keep transparency when converted locally.

PNG to WebP shrinks transparent or photographic PNGs into smaller WebP files for the web. NanoImage converts PNG→WebP locally in your browser—batch, quality slider, download as files or ZIP. Nothing uploads. Need JPG too? Use JPG to WebP or the all-format Convert to WebP hub.

100% freeNo signupNo uploadLocal in browser

Drop PNG files here or click to choose

PNG only · batch up to 20 · quality + ZIP

How do I convert PNG to WebP without uploading?

Choose PNG files in the tool above. Conversion runs with the Canvas API in your browser—nothing is uploaded to a server. You can confirm in DevTools → Network that the image bytes stay on-device.

Does PNG to WebP keep transparency?

Yes. WebP supports alpha. Transparent PNGs keep their transparency when encoded to WebP in a modern browser. Always preview if you need pixel-perfect edges on UI assets.

PNG to WebP vs JPG to WebP — which should I use?

Use PNG to WebP for graphics with transparency or flat UI art. Use JPG to WebP for photos. Mixed formats? Use the Convert to WebP hub.

How do I batch convert multiple PNGs to WebP?

Add up to 20 PNGs, set the quality slider (often 80–90% for photos, higher for sharp UI), then convert. Download each WebP or grab a ZIP of the batch.

Is a local PNG to WebP converter safer than CloudConvert / online upload tools?

Upload converters send your files to a remote server. NanoImage processes PNG→WebP locally, strips metadata via canvas redraw, and never requires an account—better for private screenshots and product assets.