Free Online PNG to WebP

A PNG-to-WebP converter swaps a heavy PNG for a smaller WebP that keeps transparency, ideal for fast web pages.

Your data is processed entirely in your browser and never sent to any server.

Instant results 100% private No signup needed

How to Use This Tool

  1. Upload a PNG image.
  2. Adjust the WebP quality slider to balance size against fidelity.
  3. Compare the original PNG size with the new WebP size.
  4. Confirm transparency is preserved in the preview.
  5. Click Download WebP to save the optimized file.

What Is a PNG to WebP?

WebP typically produces files 25-35% smaller than PNG at comparable quality while still supporting an alpha channel, which makes it an excellent drop-in replacement for transparent PNGs on the web. Smaller images mean faster page loads and better Core Web Vitals scores.

This tool decodes your PNG into a canvas and re-encodes it as WebP. A quality slider exposes the encoder's setting: near 1.0 stays close to lossless, while lower values trade fidelity for an even smaller file. Because WebP retains transparency, logos and icons convert cleanly without a background fill.

Every step runs in the browser via the Canvas API. The PNG is never uploaded, so your graphics and assets remain on your device.

Frequently Asked Questions

How much smaller is WebP than PNG?
WebP typically achieves 25-35% smaller file sizes than PNG at similar quality. Results vary by image content.
Does WebP support transparency?
Yes. WebP supports alpha transparency like PNG, making it a great replacement for transparent PNGs.
Is WebP supported everywhere?
All modern browsers support WebP. Some very old browsers may need a fallback. Check your target audience.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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