Ultra Zoom vs. AI image upscalers
Upscayl, waifu2x, Real-ESRGAN, Let’s Enhance, Topaz Photo AI — the AI upscaler ecosystem is healthy. They’re built for batch-upscaling files you’ve already saved. Ultra Zoom Pro is built for a different workflow: hover any image in your browser and run Real-ESRGAN on-device, in place, without saving or uploading anything.
When each one fits
- Desktop upscalers (Upscayl, waifu2x, Topaz) → you have a folder of files you want to render at high quality, with full control over models, scale factor, and tile size.
- Cloud upscalers (Let’s Enhance, Topaz online) → you don’t want to install anything and you’re fine with per-image pricing and uploading the file.
- Ultra Zoom Pro → you’re browsing — real estate, auctions, research archives, design references — and you want to upscale a single image right now without leaving the page.
How Ultra Zoom upscales locally
Ultra Zoom Pro bundles a Real-ESRGAN model that runs in your browser via WebGPU when available, with a WebAssembly fallback. The image is fetched as bytes, run through the model, and rendered as the hover overlay — never uploaded. There’s no Ultra Zoom server, no API key, no per-image cost. Read the architecture.
Side by side
| Feature | Upscayl / waifu2x | Let’s Enhance / cloud | Ultra Zoom Pro |
|---|---|---|---|
| Runs locally (no upload) | ✓ | – | ✓ |
| Works inside the browser | – | ✓ | ✓ |
| Hover any image, upscale in place | – | – | ✓ |
| No per-image cost | ✓ | – | ✓ |
| Batch upscaling of saved files | ✓ | ✓ | – |
| Real-ESRGAN model | ✓ | Varies | ✓ |
| Zero telemetry | ✓ | Varies | ✓ |
Try it free
The core extension is free forever. Pro — including on-device AI upscaling — is a 7-day free trial when you’re ready. See plans.