If your site still serves PNG screenshots, illustrations and product cut-outs, switching them to WebP is one of the simplest page-speed wins available. Convert a whole folder at once below, then upload the WebP files to your CMS.
How to convert PNG to WEBP
- Click Select PNG files or drag them onto the box above. You can add as many as you like.
- Check that the target says WEBP. Click the slider icon next to a file to change its options.
- Press Convert. Each file shows its own progress, and the work happens on your device.
- Download files one by one, or use Download all (ZIP). Press Convert more to start a new batch.
Resize while you convert: an image displayed at 800 px wide rarely needs to be stored at 3000 px.
PNG vs WEBP
What is PNG?
PNG is lossless and transparent, the standard for web graphics since the late 1990s. Its compression is old, so large PNGs are a common cause of slow Largest Contentful Paint scores. More about the PNG format.
What is WEBP?
WebP supports both lossy and lossless compression with transparency. Lossy WebP with alpha is typically a fraction of the size of the equivalent PNG, and every modern browser, including Safari since version 14, displays it. More about the WEBP format.
| PNG | WEBP | |
|---|---|---|
| Full name | Portable Network Graphics | WebP image |
| Extensions | .png | .webp |
| MIME type | image/png | image/webp |
When to convert PNG to WEBP
- PageSpeed Insights recommends “Serve images in next-gen formats”.
- You want transparent product images that load faster than PNG.
- Your CDN or hosting plan charges for bandwidth.
- You are building an app or game where download size matters.
Quality and settings
Quality 80–85 is a strong default for illustrations and photos and often cuts the size by 60–80%. For pixel-perfect UI screenshots with small text, use 90–95 to keep edges crisp. Transparency is preserved. If the browser cannot encode WebP itself (older Safari), ConvertCove automatically falls back to libwebp compiled to WebAssembly, so the output is the same everywhere.