Upscale images with AIAI
Upscale JPG and PNG images 2× or 4× with an AI super-resolution model, or use the instant sharp resize. Free, with before-and-after comparison.
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How to use Upscale Image
- 1Add an image
- 2Pick 2× or 4× and the engine
- 3Compare and download
What makes it better
- AI super-resolution (Swin2SR) running on your device
- Instant non-AI mode for quick enlargements
- Before / after comparison slider
Good to know
- AI runs on your device’s processor; it can take seconds to minutes depending on image size and device.
- Transparency is preserved in the enlarged PNG or WebP.
- Cancel stops after the current section; a model that is still downloading finishes in the background.
Upscale Image FAQ
Will my original image be changed?
No. Your original image stays unchanged. Download the result as a separate file.
Why does the AI mode take a while the first time?
The AI model downloads on first use (about 8 MB for 2× and 53 MB for 4×) and is usually cached by your browser. Processing then runs on your device — larger images take longer.
Is there a size limit for AI mode?
AI mode works on up to 1024 px on the long side. Larger images are reduced to that first, so the AI result is 2× or 4× the reduced size. Fast mode enlarges the whole image, up to about 50 megapixels of output on computers and 16 on phones — or more if you turn on “Keep full size”.
Which engine should I use?
AI gives crisper edges and textures on photos. Fast mode is instant and good for graphics, screenshots or when you only need a modest size increase.