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PNG to WebP Converter — Smaller, Web-Ready Images

Convert PNG to WebP in your browser to dramatically cut file size while keeping transparency. Adjustable quality, batch mode, zero uploads.

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What is the PNG to WebP Converter — Smaller, Web-Ready Images?

PNG to WebP Converter

Convert PNG images to WebP to make them far smaller while keeping transparency. WebP is supported by every modern browser and is one of the fastest ways to speed up image-heavy web pages.

Because every conversion runs through the browser's own canvas engine, your images never leave your device — there is no upload, no queue, and no server that could retain a copy.

Why convert PNG to WebP

  • Big size savings — WebP often beats PNG by 60–80% on the same image.
  • Keeps transparency, unlike JPG.
  • Tunable quality so you choose between near-lossless and ultra-small.

Tip: For UI assets and logos, try quality around 80–90% — the savings are large and the result is visually indistinguishable.

How it works

How PNG to WebP Conversion Works

Your PNG is decoded and re-encoded with the browser's built-in WebP encoder at the quality you set.

Steps

  1. Drop your PNG files.
  2. Output is preset to WebP — pick a quality level.
  3. Click Convert and download.

Behind the scenes

decode(png) -> draw to canvas -> encode("image/webp", quality)

Transparency is preserved automatically; there's no need for a background colour.

Examples

Transparent PNG icon to WebP

Convert a transparent icon to WebP at 90% quality, keeping the alpha channel.

icon.png (240 KB)
icon.webp (38 KB)

Hero image optimisation

Shrink a large PNG hero image to WebP for faster page loads.

hero.png (3.0 MB)
hero.webp (420 KB)

Frequently asked questions

Does WebP keep transparency?

Yes. Unlike JPG, WebP supports an alpha channel, so transparent PNGs stay transparent after conversion.

How much smaller will my files be?

It varies by image, but WebP commonly produces files 60–80% smaller than the equivalent PNG, especially for photographic content.

Is WebP supported everywhere?

All current browsers (Chrome, Edge, Firefox, Safari) support WebP. Very old browsers may not, so keep a fallback if you must support them.

Is the conversion private?

Yes — it runs entirely in your browser with no uploads, accounts or watermarks.

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