Are my images uploaded anywhere?

No. The conversion runs entirely in your browser using the HTML canvas API. Your images never leave your device.

Is transparency preserved?

Yes. WebP supports an alpha channel, so transparent areas of the PNG stay transparent in the converted WebP. No background colour is added.

How accurate and how small is the result?

WebP is re-encoded from the decoded PNG, reproducing it faithfully. For typical graphics and screenshots the WebP is usually far smaller than the PNG; the tool shows the exact before/after size and the percentage saved.

Why is WebP smaller than PNG?

PNG compression is lossless and tuned for graphics, so photos and complex images stay large. WebP supports lossy compression that drops detail you cannot easily see, cutting file size substantially at high visual quality.

What quality should I choose?

Around 0.8 (80%) is a good default — a large size saving with little visible loss. Raise it toward 1 for near-lossless output, or lower it if you need the smallest possible file.

Which browsers support WebP?

All current major browsers — Chrome, Edge, Firefox and Safari — can display WebP, so it is safe to use on the web. The conversion itself uses the browser's own canvas encoder.

Can I convert several PNGs at once?

Yes. Drop multiple PNG files and each is converted on its own, shown with its new size and the percentage saved, with an individual download button.

PNG to WebP Converter

Convert PNG to WebP without uploading anything

This tool converts PNG images to WebP entirely in your browser. WebP keeps the PNG’s alpha channel, so transparency is preserved, while producing a much smaller file — ideal for logos, icons, screenshots and graphics you want to serve quickly on the web.

How it works

Each image is decoded, drawn onto an HTML <canvas>, and re-encoded with the browser’s built-in WebP encoder at the quality you choose:

PNG → decode → draw to <canvas> (alpha kept) → canvas.toBlob("image/webp", quality)

No background colour is added, so transparent pixels stay transparent. The tool reports the before and after file sizes and the percentage saved.

Example

A 400 KB PNG logo with a transparent background, re-encoded at quality 0.8, typically drops to 80–120 KB as WebP — a saving of around 70% — while keeping the transparency intact.

Quality	Typical outcome
1.0	Near lossless, largest WebP
0.8	Big saving, no visible loss
0.5	Smallest, slight softening

Everything happens locally — your images are never uploaded, stored, or seen by anyone.