AI Image Upscaler

AI Image Upscaler — 2× Super-Resolution in Your Browser

This tool uses Swin2SR, a Swin Transformer V2-based image super-resolution model, to double the resolution of images directly in your browser. Swin2SR achieved state-of-the-art results on benchmark datasets when it was published and produces sharp, natural-looking output without the ringing artefacts common in older upscaling methods. The quantised model (~150 MB) downloads once and is cached locally. Works best on images up to 512×512 pixels — larger inputs work but take longer. The output is always a lossless PNG at exactly 2× the input dimensions. Nothing is uploaded to a server.