AI Image Upscaler — Free 2x & 4x

It does not recover the original pixels; it predicts plausible detail, giving cleaner edges, less noise and fewer JPEG blocks than plain resizing. Results are best on small or slightly soft photos; very blurry images or tiny faces can come out smooth or painterly.

No. The AI model (53 MB, or 8 MB for the lighter version) downloads once from Hugging Face and is cached by your browser; the upscaling itself happens entirely on your device.

AI upscaling is heavy work, done tile by tile. With WebGPU (Chrome or Edge on a computer) a profile-size photo takes from a few seconds to a minute or two, depending on your graphics card. Without it, a lighter model runs on the processor and big photos can take many minutes. You see the time left and can cancel at any point.

Up to 48 megapixels on a computer and 16 MP on a phone, because browsers refuse larger canvases. If a result would go over the limit, the photo is reduced first and you are told the final size before you start.

Yes. Because the work runs on your own device there are no server costs, so there is no quota, no watermark and no sign-up.