Make PNG graphics larger while keeping them sharp

PNG is lossless, which makes it the ideal starting point for upscaling. There is no compression damage to hide, so a PNG enlargement is limited only by how much detail the original contains.

A transparent PNG graphic enlarged with clean edges preserved

Upscaling a PNG with transparency

Logos, stickers and cut-out product images often rely on a transparent background. When you upscale a PNG with Lanczos or bicubic, ClarityUp 4K resamples the alpha channel along with the colour channels, so soft edges stay soft and transparent areas stay transparent in the PNG download.

A note on Deep Enhance

Real-ESRGAN in Deep Enhance processes colour only, so use Lanczos when preserving transparency matters more than reconstructed detail.

Best settings for PNG artwork and screenshots

PNG graphics with flat colours and hard edges look best with Lanczos and a low sharpness value. Heavy sharpening creates halos around text and outlines, which are especially visible on a flat background. Download as PNG to keep the output lossless.

Frequently asked questions

Does the upscaled PNG keep its transparent background?

Yes, when you use Lanczos or bicubic and download as PNG. Deep Enhance works on colour channels only, so it is not the right choice for transparent images.

Why is my upscaled PNG file so large?

PNG is lossless, so a 4K PNG stores every pixel exactly. If file size matters more than perfect quality, export as JPG instead.