FAQ
Comparison
4 questions in this category.
How does it compare to remove.bg?
Remove.bg is a paid API/service that processes images on their servers. NSS is free, processes images on your device (complete privacy), works offline, and exports true straight-alpha transparency. Remove.bg does have a polished UI and fast cloud processing; NSS trades that for privacy and cost.
How does it compare to Canva's background remover?
Canva's tool requires an account, uploads your images to their servers, and requires a paid plan for high-volume use. NSS is free, requires no account, and never uploads your images. For transparency quality, NSS outputs straight alpha which composites correctly everywhere; Canva's output can have premultiplied alpha issues in professional tools.
Why do other free tools show a black background in Photoshop?
Most free tools export premultiplied alpha, which bakes the background colour into edge pixel RGB values. When Photoshop (which expects straight alpha) reads the file, those "transparent" pixels appear black. NSS always exports straight alpha — validated automatically after every export.
What makes NSS uniquely different?
Three things: true straight-alpha exports (verified automatically), complete on-device privacy (architectural, not just policy), and genuinely free with no quality paywall. Most tools get one of these right. NSS gets all three.