Convert PNG to WEBP, Free
Files convert instantly in your browser. 100% private, any file size, no account needed.
Drop your PNG file here
or click to browse. Any file size.
Conversion runs entirely in your browser. Your file never leaves your device.
How to convert PNG to WEBP
WebP is a modern image format developed by Google that produces files roughly 25 to 35 percent smaller than PNG at equivalent visual quality, while also supporting transparency. It has been natively supported in all major browsers since 2020. Converting PNG to WebP is the standard recommendation for web performance: the same visual result loads faster, which directly affects page load time and Core Web Vitals scores.
This converter encodes your PNG as WebP directly in your browser using WebAssembly. The image never leaves your device. You can choose between lossless WebP (bit-identical to PNG but smaller) and lossy WebP (even smaller, with slight quality reduction controlled by a quality slider). Transparency from the PNG is preserved in both modes.
Upload the PNG
Drop your .png file onto the converter. Any PNG including those with transparency (alpha channel) is accepted.
Choose lossless or lossy
Lossless WebP is larger but pixel-perfect, good for logos and screenshots. Lossy WebP at quality 80 to 85 is better for photographs, producing the smallest files at acceptable quality.
Convert in browser
The WebAssembly encoder processes the PNG pixel data and writes the WebP file locally. No server is involved.
Download and deploy
Save the WebP file. Replace the PNG reference in your HTML or CSS with the WebP path. Optionally, keep the PNG as a fallback for older clients using a picture element with a srcset.
Frequently asked questions
How much smaller will the WebP file be?
Lossless WebP is typically 25 to 35 percent smaller than PNG for the same image. Lossy WebP at quality 80 is often 60 to 80 percent smaller than PNG. The exact savings depend on the image content.
Does WebP support transparency?
Yes. WebP fully supports an alpha channel, and the converter preserves PNG transparency in the WebP output in both lossless and lossy modes.
Is my image uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly. Nothing is sent anywhere.
Do I still need a PNG fallback for older browsers?
WebP is supported in Chrome since version 23 (2012), Firefox since version 65 (2019), and Safari since version 14 (2020). As of 2024, global WebP support exceeds 96 percent of users. You likely do not need a fallback unless you specifically support very old browsers.
What quality setting produces the best balance for photographs?
Quality 80 to 85 is the standard recommendation. Below 75, blocking and ringing artifacts appear around high-contrast edges. Above 90, the file size increases substantially with diminishing visual returns.