Free · No sign-up · Runs in your browser

Convert WebP to PNG.

Turn WebP images into lossless PNGs with transparency kept intact — batch convert as many as you like, without a single file leaving your device.

Not uploaded — nobody sees it Keeps transparency No watermark, ever No subscription or account

Drop your WebP images here, or click to browse WebP files · add as many as you like

Your files are never uploaded — they’re processed right here in this browser tab, on your device. There’s no server involved, so we never see them, copy them or keep them.

How it works

Three steps, no waiting on a server

Altto's WebP to PNG tool works right in your browser tab using the canvas built into every modern browser, so there's no upload queue and no “processing your file” spinner tied to someone else's servers.

Add your WebP images

Drop in one or more .webp files.

Convert

Altto decodes and re-encodes each image locally as lossless PNG.

Save your PNGs

One image downloads directly; several come back as a .zip.

Why this runs in your browser, not on a server

Photos and screenshots often contain things you’d rather not hand to a stranger’s server just to change the file format. Altto skips that step completely — there’s no server for it to go to.

Nothing is uploaded, everEvery image is decoded and re-encoded using your browser’s own canvas, because there’s no server on the other end. That also means we can’t see it, copy it or keep it.
No account, no email wallConvert as many images as you like without signing up or handing over an email address.
Batch conversion built inAdd a whole folder of WebP images at once and get them all back together.

images stored on our servers. There’s no server involved at all — each PNG is built once, then everything happens locally.

FAQ

Frequently asked questions

The practical details on what this tool can and can’t do. Need JPG instead? Try WebP to JPG.

Why convert WebP to PNG instead of JPG?

PNG keeps transparency and gives you a lossless, editing-friendly file — better than JPG if you need to keep working on the image or it has a transparent background.

Is my image uploaded anywhere?

No — nothing is ever uploaded. Every image is decoded and re-encoded entirely inside this browser tab using the canvas built into your browser. There's no server involved at all, so there's nothing for Altto to see, copy or keep.

Will I lose quality?

No. PNG is lossless, so the converted image keeps the same pixel data as the original WebP.

Does transparency carry over?

Yes — PNG supports transparency, so any transparent areas in the WebP are preserved.

Can I convert several images at once?

Yes — add as many WebP files as you like. One image downloads directly; more than one comes back as a .zip.

Do you keep a copy of my images?

No. There's no upload, so there's nothing on our side to keep. See the Privacy Policy for details.

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