PNG to WebP Converter
Image Converter: JPG, PNG, WebP, AVIF, GIF, BMP, SVG to WebP
Convert still images to WebP and keep only smaller outputs. Max 100 images at a time.
Drag and drop images here, or click to select
JPG, PNG, WebP, AVIF, GIF, BMP, SVG supported. GIF converts its first frame only.
PNG to WebP: real file size changes
| Files | PNG | WebP | Change |
|---|---|---|---|
| 5 social cards, 1200 x 630 | 95 KB | 19 KB | -80% |
| 5 screenshots, 512 to 1440 px | 349 KB | 89 KB | -60% |
| Worst case: flat screenshot, 512 x 273 | 26 KB | 30 KB | +15% |
Median sizes at the first attempt, quality 80. When the WebP is larger, the converter retries at lower quality and keeps your original if nothing smaller comes out.
How much does PNG to WebP save, and when does it not?
Updated
A PNG to WebP converter re-encodes the image with WebP compression and keeps the alpha channel, so transparent PNGs stay transparent. In our sample the WebP files were 80% smaller for social cards and 60% smaller for screenshots, which makes PNG to WebP one of the biggest image savings on a typical site.
Not every file shrinks. One small screenshot with flat colour came out 15% larger at quality 80. The converter handles that for you: it tries lower quality settings and, if no WebP is smaller, it keeps the PNG and tells you so.
Related guides: image converter for every format, JPG to WebP converter, image SEO guide.
Common Questions
Does PNG to WebP keep transparency?
Yes. WebP supports an alpha channel in both lossy and lossless mode, so transparent and semi-transparent pixels carry over. Check soft shadows at full size, since lossy compression can add slight banding to them.
Is the converter lossy or lossless for PNG to WebP?
Lossy, with a quality slider. The default of 80 cut our sample by 60% to 80% with no visible change on cards and screenshots. For pixel-exact graphics, raise the quality or keep the PNG.
What if the WebP is bigger than my PNG?
The converter tries quality 80 first, then lower settings, and keeps the original PNG when no WebP is smaller. The results table shows the skipped file and the WebP size it would have had.
How do I batch convert PNG to WebP for a website?
Drop up to 100 PNG files on the converter, keep WebP selected, and download all results. Then replace the files on your site or serve them through a picture element with the PNG as a fallback.
Will WebP images hurt my SEO?
No. Google indexes WebP in web and image search. Smaller images load faster, which helps Largest Contentful Paint. Keep descriptive file names and alt text when you swap formats.
Should I use WebP or AVIF instead of PNG?
Both beat PNG for most web images. AVIF is often smaller still but slower to encode, and canvas-based tools cannot create it in most browsers. WebP is the safe default with near-universal support.