PNG to WebP Converter — Free Online
Convert PNG to WebP and keep transparency at a fraction of the file size. WebP is 25-35% smaller than equivalent PNG on most images.
WebP vs PNG
Both are lossless options. WebP also supports a lossy mode that is dramatically smaller than PNG with negligible visible difference. Modern browsers all support WebP natively.
Web performance
Switching site assets from PNG to WebP is one of the easiest performance wins available — Lighthouse will reward it and Largest Contentful Paint drops on every page.
Frequently asked questions
Will old browsers display WebP?
All modern browsers do. Internet Explorer is the only holdout, and its usage is now under 0.1%.
Is it actually free?
Yes. No signup, no daily cap on normal personal use, no watermark on the output. Display ads keep the site free.
Does it work on a phone?
Yes. The upload box opens the camera roll on mobile browsers directly.
What happens to my photo?
Uploads are processed to return a download link and removed automatically within an hour. We do not view, share, or sell your files.