Convert PNG to WebP
Free online PNG to WebP converter. Drag and drop files, convert in batch, and download, without ever uploading to a server.
Why convert PNG to WebP?
Lossless WebP is typically about 26% smaller than an equivalent PNG, and it keeps full transparency. Lossy WebP can shrink photo-like PNGs much further when a bit of quality loss is acceptable. Converting PNG screenshots, app icons, and UI assets to WebP often improves LCP on modern websites.
Tips
- Quality 80-85% is visually indistinguishable from lossless for most photos.
- WebP supports both lossy and lossless modes. This tool defaults to lossy with quality control.
- All modern browsers support WebP (Chrome, Firefox, Safari 14+, Edge).
Lossless WebP keeps every pixel
Most WebP conversion tools default to lossy mode, so people assume WebP always discards detail the way JPG does. WebP also has a lossless mode that keeps every pixel from the source PNG. It still uses a more efficient compression scheme than PNG's deflate algorithm. For a PNG that's mostly flat color or text, lossless WebP can beat the original PNG's file size with zero quality loss. If your image can't lose a single pixel, for example a diagram with fine text, try lossless mode before you keep the PNG.
Frequently asked questions
How do I convert PNG to WebP?
Drop your PNG file into the converter above, adjust the quality if needed, and click "Convert to WebP". The conversion happens entirely in your browser. Your file is never uploaded to any server.
Is the PNG to WebP conversion lossless?
WebP is a lossy format. Quality is controllable from 1-100% (default 92%); at recommended settings the result is visually close to the source for most photos.
Is there a file size limit?
The tool can handle files up to about 20 MB per image. Since processing happens in your browser, the practical limit is your device's available memory. Most modern devices can comfortably batch-convert dozens of images at once.
Are my PNG files uploaded to your servers?
No. All PNG to WebP conversion happens entirely client-side. Conversion uses the Canvas API. Your files never leave your browser.
Will my transparent PNG stay transparent as WebP?
Yes. WebP has full 8-bit alpha transparency in both lossy and lossless modes. Soft, partially transparent edges (a drop shadow or an anti-aliased logo) keep that same gradual transparency in WebP. GIF only supports hard on-or-off transparency with no partial values. If your PNG has a clean cutout or a smooth fade to transparent, WebP preserves it either way.