Free Online Image Upscaler (GPU Accelerated / RealCUGAN) - ATools

Free online image upscaler with 2×/3× enlargement. Uses WebGPU / WebGL 2 Shader hardware acceleration by default, with RealCUGAN AI and high-quality resize fallbacks.

View source on GitHub

Image upscaler: uses GPU Shader acceleration by default (supports WebGPU / WebGL 2, millisecond speeds, zero model downloads, 100% private & client-side). RealCUGAN AI and compatible resize modes are also supported.

Drag and drop a new image here to replace directly

Engine mode

ScaleStyle preset

Download

Note

GPU acceleration is recommended: runs in milliseconds via your local graphics hardware (WebGPU / WebGL 2) without downloading multi-megabyte models. Completely private and client-side.

Engines: WebGPU / WebGL 2 Shader + RealCUGAN-ncnn-webassembly

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Output

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