Once the original background is gone, you need a high-quality replacement.
: A surprisingly capable image editor specifically for Windows. It is user-friendly and great for quickly isolating subjects, allowing you to save as a PNG for easy background replacement.
: Upload a new background image or select a solid color.
If you tell me what type of photo you are editing (product, selfie, landscape), I can recommend the exact best tool for your needs! AI-Powered Free Background Changer - Picsart
: A versatile app (and web tool) that uses Adobe's AI technology for rapid background removal, often at full resolution.