Convert PNG to WebP with quality slider, lossless mode toggle, and file size comparison. WebP is 25–35% smaller than PNG losslessly and up to 80% smaller with lossy compression, while preserving full transparency. Batch up to 10 files.
Upload up to 10 PNG images. WebP fully supports alpha channel transparency, so transparent PNGs are converted without any quality loss to transparency.
Quality slider (1–100) controls lossy compression. Toggle Lossless mode for pixel-perfect conversion with no quality loss (but larger files than lossy at equivalent visual quality). Recommended: quality 80 for most images, lossless for graphics and logos.
Size comparison shows original PNG size, output WebP size, and percentage savings. Download individually or as ZIP.
Lossless WebP images are on average 26% smaller than equivalent PNG files. With lossy compression, WebP can be 50–80% smaller than PNG while appearing visually identical to the human eye. The savings vary by image type: photographs with natural gradients compress very efficiently, while simple graphics with solid colours see more modest savings.
Yes. WebP supports full alpha channel transparency in both lossless and lossy modes. Transparent PNGs convert directly to transparent WebP without any workarounds — unlike JPG, which requires filling transparent areas with a background colour.
WebP is supported by all modern browsers: Chrome 32+, Firefox 65+, Safari 14+, Edge 18+, Opera 19+. Global browser support is approximately 97% as of 2025. For the remaining ~3% (mainly very old Safari on iOS 13 and below), use a PNG fallback with the HTML picture element.
Lossless WebP: use for logos, icons, screenshots, UI graphics, and any image where pixel-perfect accuracy is required. The output is 26% smaller than PNG but larger than lossy WebP. Lossy WebP: use for photographs, product images, and any real-world imagery where a small quality reduction is imperceptible but file size matters. Quality 80 is a good default.
Both are modern formats that outperform PNG and JPG. WebP: supported by 97%+ browsers, good compression, 26% smaller than PNG losslessly. AVIF: 50% better compression than WebP, HDR and 12-bit support, but slightly lower browser support (~90%) and slower encoding. For maximum compatibility, use WebP. For maximum compression on modern sites targeting 2025+, use AVIF with a WebP fallback.
Method 1 (HTML picture element): <picture><source type="image/webp" srcset="image.webp"><img src="image.jpg" alt="..."></picture>. Method 2 (server-side): configure nginx or Apache to serve .webp files when the browser sends Accept: image/webp. Nginx: add_header Vary Accept; with a map to serve the .webp version automatically. WordPress: plugins like Imagify and ShortPixel auto-convert and serve WebP.
