AI Image Upscaler 🔒 Runs locally in your browser — nothing is uploaded.

Upscale images 4x with a real local AI super-resolution model.

Drop an image here, or click to choose

Input is capped at 128×128px before upscaling (4x output up to 512×512) — the model is memory-heavy and larger inputs can crash the tab on devices without WebGPU. Best for small photos, icons, and thumbnails.

About this tool

Upscales an image to 4x its resolution using Swin2SR, a real AI super-resolution model — not simple pixel interpolation. Runs entirely in your browser via WebGPU/WebAssembly, no upload. The model downloads once and is cached for instant reuse.

Frequently asked questions

Is this really AI upscaling, or just resizing?

It's a real AI model — Swin2SR, a transformer-based super-resolution network trained to reconstruct plausible fine detail — not simple pixel duplication or bicubic interpolation like a browser's built-in image resize. This is why AI upscaling produces sharper edges and more believable texture than a plain resize.

Does my image get uploaded anywhere?

No. The AI model downloads to your browser once, and every image you upscale after that is processed entirely on your own device.

What is the maximum input size?

Input is capped at 128×128px (producing up to a 512×512px output). Testing showed larger inputs can crash the browser tab on devices without WebGPU, since this super-resolution model is very memory-hungry — this limit keeps the tool reliable across more devices. It works best on small photos, icons, and thumbnails rather than large full-resolution photos.