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WebP Alpha Optimizer

🟢 Runs Locally — verified: your files are processed in this browser. No uploads.

Optimize WebP images while keeping their transparency intact — entirely in your browser, with nothing uploaded.

Start converting ↓

Drop, convert, download

Processing happens on your device using Web Workers — your images never leave the browser.

Quality 82%
Resize (px, optional)
×

Your converted images will appear here.

How to use this tool

  1. 1

    Select a WebP image

    Drag and drop a .webp file, or choose one from your device.

  2. 2

    Review the optimization

    The tool reports what it can reduce while preserving the alpha transparency.

  3. 3

    Download the result

    Save the optimized WebP. The original file on your device is left untouched.

Format comparison

What it doesDetail
Input formatWebP images, including images with an alpha channel
TransparencyPreserved — the alpha channel is not discarded
Where it runsYour browser; the image is not uploaded
Original fileUnchanged — you download a separate optimized copy

Frequently asked questions

Does it keep my transparency?
Yes — preserving the alpha channel is the point of the tool; transparency is not flattened.
Which format do I need to upload?
WebP. Convert other formats first with the Image Converter or a WEBP converter tool.
Is my image uploaded?
No. Processing happens in your browser and the image never leaves your device.
Will the output look identical?
It should — the goal is a smaller file at the same visual quality, with the alpha channel intact.

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