PNG to WebP: help & limits

Turn a still PNG into a WebP while keeping transparent areas. This is useful for web illustrations, product cutouts and other images that need an alpha channel. Review thin edges, small text and subtle gradients in the preview: this converter uses lossy WebP, so it changes more than just the file extension.

How to use

1. Choose a still PNG with or without transparency.
2. Compare the WebP preview with the original, paying attention to edges and small text.
3. Download the WebP, or keep your PNG if the new format does not suit the image.

Supported files

Still PNG · Up to 64 MiB · 64 megapixels. One image at a time. Maximum 16,384 pixels per edge and 128 MiB output.

How it works

PNG pixels are decoded locally and encoded as WebP at quality 92 out of 100. Transparent regions remain transparent; the checkerboard is only a preview aid. The browser encoder controls the exact output.

Examples

Limitations

• This is lossy WebP, not a lossless PNG-to-WebP encoding mode. Exact pixel equality is not promised.
• Animated PNG is rejected. Some browsers can display WebP but cannot encode it; those browsers receive a local error.
• Large or complex images may not shrink. 16,384 pixels per edge; metadata and exact color-profile fidelity are not guaranteed.

Privacy

The PNG, decoded pixels and WebP output stay in browser memory during conversion. Reqly has no upload endpoint or external converter for this operation.

Common questions