About this tool
Switching PNG images to WebP typically cuts file size by 25-35% at the same visual quality, and by far more when you allow lossy compression. Smaller images mean faster pages and better Core Web Vitals scores, which is why WebP is the default recommendation for web images.
About the formats: PNG (Portable Network Graphics) is a lossless image format with full transparency support. It is the standard choice for screenshots, logos, icons, and anything with sharp edges or text, but it produces much larger files than JPG or WebP for photographs. WebP is Google's modern web image format. It supports both lossy and lossless compression plus transparency, and typically comes out 25-35% smaller than an equivalent JPG or PNG. Every current browser displays it, but some older desktop apps and upload forms still reject it.
Everything happens inside your browser. Your file is never uploaded to a server: the conversion runs on your own device using WebAssembly, and the result is downloaded straight from memory. Close the tab and nothing is left behind.
How to use it
- Drop your PNG files into the box above, or click to browse. Nothing is uploaded.
- Adjust the options if you want; the defaults suit most files.
- Click Convert to WEBP and wait a moment.
- Download the results individually or all at once as a ZIP.
Frequently asked questions
Is transparency kept when converting PNG to WebP?
Yes. WebP fully supports alpha transparency, so logos and icons convert cleanly.
What quality setting should I use for web images?
80-85 is the sweet spot for photos. For graphics with flat colors, use 95-100 to avoid faint blurring.
Is this really free?
Yes. The site is supported by ads, and there are no limits on how many files you convert.
Are my files uploaded anywhere?
No. The converter runs entirely in your browser. Files stay on your device, which also makes it faster than upload-based converters for anything larger than a few megabytes.
Is there a file size limit?
The only limit is your device's memory. Images and audio of any normal size are fine; for video, files under about 500 MB work well on most laptops and phones.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, and Safari on desktop and mobile. Very old browsers without WebAssembly support will not work.