Does it work offline?
Yes, after the first run. The model downloads once — 4.4 MB — and everything after that is computed locally with no network access at all.
Why is the output always a PNG?
Because PNG is the common image format that carries transparency. Saving the result as a JPEG would flatten the alpha channel and fill the background back in with white, throwing away the entire point of the job.
What kind of images work best?
Photos with one clear subject against a reasonably distinct background — people, products, pets. Busy scenes with no obvious focal point give a rougher edge, and ViralMint warns you when it could not find a clear subject rather than handing back a mostly-empty file.
Can I use the cut-out for a YouTube thumbnail?
That is one of the most common uses. Cut the subject out, then drop the transparent PNG over a background in ViralMint's AI Thumbnail tool.
Is there a limit on how many images I can do?
No. It runs on your own hardware, so there is no per-image credit and no daily quota — only how fast your CPU gets through them.