When upscaling helps (and when it can't)
It shines on old photos, small logos, product shots saved at low resolution, and screenshots destined for print.
It can't invent what was never captured — heavy motion blur or extreme compression artifacts limit any upscaler.
Getting the best result
Start from the largest original you have — never from a screenshot of a screenshot.
Upscale 2× first and inspect; jumping straight to 4× amplifies any noise in the source.
For faces, follow the upscale with a light sharpen rather than pushing the scale factor higher.
Doing it free in the browser
1. Open the upscaler and drop in your image.
2. Choose 2× or 4× and run it.
3. Compare before/after, then download the PNG.