How much smaller is WEBP compared to PNG?

WEBP files are typically 25-35% smaller than equivalent PNG files with no visible loss in quality. For a 5 MB PNG image, you can expect the WEBP version to be around 3-4 MB. The savings are even more dramatic for photographs, where WEBP's lossy mode can achieve much higher compression.

Does WEBP support transparency like PNG?

Yes. WEBP fully supports alpha transparency, just like PNG. When you convert a PNG with transparent areas to WEBP using AllConvert, the transparency is perfectly preserved. This makes WEBP an excellent replacement for PNG on websites.

Do all browsers support WEBP images?

Yes, all modern browsers including Chrome, Firefox, Safari, and Edge support WEBP. Safari added support in version 14 (2020). The only browsers that do not support WEBP are Internet Explorer and very old versions of Safari, which together represent less than 1% of web traffic.

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Want smaller image files without sacrificing quality or transparency? AllConvert converts your PNG images to WEBP format instantly in your browser. No upload, no account, no software to install. Your files never leave your device.

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Why convert PNG to WEBP?

WEBP is a modern image format developed by Google that delivers significantly smaller file sizes than PNG. On average, a WEBP file is 25-35% smaller than an equivalent PNG with no visible difference in quality. For website owners, this translates directly to faster page loads, lower bandwidth costs, and better Core Web Vitals scores. Google explicitly recommends serving images in WEBP format for optimal web performance, and Google PageSpeed Insights will flag PNG and JPG images as opportunities for improvement.

Transparency preserved

One of the biggest advantages of WEBP over JPG is that WEBP supports alpha transparency, just like PNG. When you convert a PNG logo, icon, or graphic with transparent areas to WEBP, the transparency is fully preserved. This means you can replace every PNG on your website with WEBP without worrying about losing transparent backgrounds. The result is the same visual appearance at a fraction of the file size.

Ideal for web optimization

If you run a website, blog, or online store, converting your PNG images to WEBP is one of the easiest performance wins available. Every major browser now supports WEBP, including Chrome, Firefox, Safari, and Edge. For the rare visitor using an unsupported browser, you can use the HTML picture element to provide a PNG fallback. AllConvert makes the conversion effortless: drop your files, convert, and your optimized WEBP images are ready to use.

How to convert

Open AllConvert and drop your PNG file onto the page.
Select WEBP from the format dropdown on the file card.
Click Convert and download your new WEBP file.

The entire process runs locally in your browser. Nothing is uploaded, and there are no file size limits beyond your device's memory. It works on desktop and mobile, in Chrome, Firefox, Safari, and Edge.

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