MARZAI Image Upscaler
Upscale a photo to 2x resolution using an on-device AI model.
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About this tool
Upload a lower-resolution image to upscale it 2x using a compact super-resolution AI model (Swin2SR) that runs entirely in your browser via WebAssembly — no server, no upload.
How to use
- Drop or select an image.
- Wait for the one-time AI model download on first use (cached afterward), then upscaling runs automatically at 2x.
- Download the upscaled result.
FAQ
Will this work well on any photo?
It's built for small, low-resolution images — the tool automatically downscales larger inputs first, since running the AI model at full photo resolution on CPU can be very slow or memory-intensive without a GPU.
Is this as good as professional upscaling software?
It uses a small, browser-friendly model chosen for speed over maximum quality — expect solid improvement, not professional-grade results.