Local and private
Your source image and upscaled output stay on your device. Only static model assets are downloaded.
Three super-resolution models · self-hosted by WKO AI
Free image upscaling that stays in your browser
Enlarge images 2x or 4x without uploading them. Pick a model for speed, clean detail, JPEG artifacts, or noisy real-world photos; inference runs locally and the weights come from our own domain.
Try it freeChoose the right restoration
Three verified models, one private tool
Every shipped weight carries a permissive license (Apache-2.0 or BSD-3-Clause), is SHA-256 verified during mirroring, sits below Cloudflare's 25 MiB asset limit, and is cached by your browser after the first use.
| Model | Scale | Format | Size | Best for |
|---|---|---|---|---|
| Swin2SR Lightweight 2xdefault 2x | 2x | fp32 | 8.08 MB | Speed on any device |
| Real-ESRGAN General x4v3default 4x | 4x | fp32 | 4.87 MB | Photos, screenshots, JPEGs |
| Swin2SR Classical 4x | 4x | q8 | 21.6 MB | Clean-source 4x fidelity |
Free and unlimited
No credits, account, watermark, or server-side processing bill. Your device performs the inference.
Direct model downloads
Each model page includes exact bytes, SHA-256, license attribution, and the same ONNX file used by the studio.