PNG to WEBP Converter

Convert PNG graphics to WebP when a website needs smaller images without automatically giving up transparent backgrounds. This direction is especially useful for screenshots, product cut-outs, interface illustrations and other PNG assets that are larger than necessary for browser delivery.

Why convert PNG to WebP?

PNG uses lossless compression and is excellent for sharp edges, text and alpha transparency. The tradeoff is file size: detailed screenshots and large transparent graphics can become heavy. WebP supports transparency and offers both lossy and lossless encoding, giving you more control over the balance between visual quality and download size.

Do not convert every PNG blindly. Small icons and simple logos may already be compact, and SVG may be a better choice for vector artwork. Conversion is most useful when the source is a large raster image intended for a web page.

Preserve transparent edges

Transparency support does not guarantee that every result will look identical. Inspect soft shadows, anti-aliased logos, hair and product cut-outs over both light and dark backgrounds. A transparent edge that looks correct on white may reveal a halo on a darker page.

For screenshots and UI images, compare small text and one-pixel lines. A strongly lossy setting can make the output smaller while creating blur or ringing around high-contrast elements. Lossless WebP is a better starting point when pixel accuracy matters.

How to convert PNG to WebP

1. Add one or more PNG files.
2. Choose the WebP quality or lossless option available in the tool.
3. Convert a representative screenshot or transparent graphic.
4. Compare text, edges, transparency and file size with the original PNG.
5. Download the WebP files and test them on the actual page background.

Batch limits and website testing

The tool supports batches of up to 100 images, with a 30 MB per-file limit and a 500 MB combined limit. Multiple successful files can be downloaded in one ZIP. Start with a small sample because photographs, screenshots and flat-color graphics respond differently to the same quality setting.

WebP is broadly supported in current browsers, but older editing tools may still require PNG. Keep the original files and verify the CMS, CDN, social preview generator and image optimization pipeline before removing PNG fallbacks.

Local processing

Supported conversion runs locally in your browser, so the PNG files do not need to be uploaded to zer.ai. Large dimensions and batches still depend on device memory. Use Image Resizer first when the source contains more pixels than the page will display, or Image Compressor when you want to keep PNG as the output.