About the Image Upscaler
Increase the resolution of any image 2× or 4× directly in your browser using fast bicubic interpolation or AI super‑resolution. The default mode provides instant results with high‑quality canvas upscaling. Enable AI enhancement to run a Real‑ESRGAN neural network that restores low‑resolution images, sharpens blurry photos, and increases image resolution without quality loss — ideal for photo restoration and digital art enhancement.
Fast mode vs AI mode
- Fast (default): bicubic canvas upscale. Instant, zero downloads, works on any device — perfect for quick image resizing and basic resolution increases.
- AI enhance: tile‑based Real‑ESRGAN inference via ONNX Runtime Web. Provides better detail recovery, 4× super‑resolution enhancement, and improved clarity. The model downloads once (~20MB) and is then cached.
Frequently asked questions
How does the upscaler work?
Fast mode uses high‑quality bicubic interpolation for instant 2× or 4× upscaling. AI mode uses Real‑ESRGAN for AI super‑resolution to recover sharper detail, enhance low‑resolution images, and improve clarity.
Is my image uploaded anywhere?
No. This is a private AI image upscaler — all processing happens locally in your browser. The AI model downloads once and stays cached, but your image never leaves your device.
Why does AI mode take longer?
AI super‑resolution runs a neural network tile‑by‑tile on your device. The first run downloads the model (~20MB), then uses cache for faster processing. Larger images require more computation for super‑resolution enhancement.