Convert PNG to WebP
Heavy PNGs made web-light — transparency kept, size dropped, converted on your device.
Drop your image here
or
JPG, PNG, WebP, HEIC, SVG — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
PNG is the default format of screenshots, UI graphics, and logos — faithful, transparent, and heavy. WebP keeps what makes PNG useful, transparency included, while cutting file size drastically: exactly what a page full of interface shots or product graphics needs to stay fast.
The conversion decodes each PNG and re-encodes it as WebP in your browser, alpha channel preserved. Screenshots with private content never upload anywhere — the files are read and written entirely on your own device, singly or in batches.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Choose quality or size
Pick a quality preset, set an exact KB target, or switch the output format — tuned for png to webp.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
Does the transparent background survive?
Yes — WebP supports full alpha transparency, so logos, cutouts, and UI elements keep their transparent regions exactly as the PNG had them.
How much smaller do screenshots get?
Screenshots and flat graphics compress exceptionally well — halving is common and larger reductions are frequent, because WebP handles areas of uniform color and text far more efficiently than PNG.
When should an image stay PNG?
When it is headed into an editor or pipeline that expects PNG, or when it must be pixel-perfect lossless for further editing. For images being served on pages, WebP is the better carrier.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.