PNG to WebP Converter

If you are chasing a better PageSpeed score, this is one of the easiest wins available. WebP typically produces files 25–45% smaller than the equivalent PNG, keeps full alpha transparency, and is supported by every browser people actually use today.

Why WebP replaced PNG for most web work

PNG has been the web’s transparency format since the nineties, and it was never especially efficient. Google built WebP specifically to fix that: same lossless quality when you want it, same alpha channel, considerably smaller files.

The old objection was browser support. That argument is over. Chrome, Firefox, Edge, Safari and every mobile browser in current use handle WebP without a polyfill. Converting your PNG assets to WebP is now simply free performance.

How to convert PNG to WebP

1. Add the PNG you want to convert — drag and drop works.
2. Choose lossless if the image is a logo or has crisp edges; lossy is fine for anything photographic.
3. Convert, then check the size difference.
4. Download the WebP file.
5. Swap it into your site and keep the PNG as a fallback if you support very old software.

What WebP does better than PNG

• Smaller files at the same visual quality, which directly improves Largest Contentful Paint.
• Full alpha transparency, including soft, feathered edges — no white boxes.
• Both lossy and lossless modes, so you can pick per image instead of per format.
• Animation support, meaning it can also replace heavy GIFs.
• Less bandwidth for your visitors, which matters most on mobile data.

A realistic expectation

A detailed screenshot might only shrink by 20%. A simple logo with flat colour can drop by 70%. The savings depend entirely on the image. Convert a handful of your heaviest assets first and measure — that is where the real gains hide.

PNG to WebP questions