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Convert PNG to WebP, Keeping Transparency

Convert a PNG to WebP for a much smaller file with transparency intact.

Most tools run entirely on your device

Select an image

Click to choose, or drop a file here

You can also paste (Ctrl+V / Cmd+V)

Most tools run entirely on your device

About converting PNG to WebP

WebP can match PNG's lossless quality and transparency support while producing a meaningfully smaller file — a straightforward win for a PNG that's mostly being served on the web rather than edited further.

The image is decoded and re-encoded as WebP on a canvas, entirely in your browser, with transparency preserved. You can choose lossless (matching PNG's exact quality) or lossy WebP for an even smaller file.

Supported files

Accepts PNG images. Produces a .webp image.

Is my file uploaded?

No. The PNG is decoded and re-encoded as WebP entirely in your browser on a canvas — it's never uploaded.

How to PNG to WebP

  1. 1

    Add the PNG

    Drop in a .png image.

  2. 2

    Convert

    It is converted to WebP for a much smaller file, with transparency intact.

  3. 3

    Download the WebP

    Save the WebP — a fraction of the PNG's size.

PNG to WebP — frequently asked questions

Is WebP lossless like PNG?+

WebP has both a lossless and a lossy mode. This tool uses lossy WebP for a much smaller file; transparency is kept either way.

Will I see a difference?+

For most graphics and screenshots the difference is negligible while the file is far smaller.

Is there a free way to convert PNG to WebP, keeping transparency?+

Yes — this tool decodes and re-encodes the PNG as WebP entirely in your browser, free and with nothing uploaded.

Is my file uploaded to convert it?+

No — the PNG is decoded and re-encoded as WebP entirely in your browser.

Do you upload my files to a server?+

No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The only exception is the AI tools, which send the extracted text (not the file) to Claude to do their work.

Is there a file size limit?+

There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.