What free software can I use to replace a photo background?

Are you looking for something simple or do you want really professional results? For free stuff, **Photopea** is pretty nice if you want to stay in your browser - it works well for isolating and changing a background. Otherwise **GIMP** is free too but you gotta learn it a bit, though you've got way more control. If you just want something quick and hassle-free, even **Canva**'s free version can do it with their ready-made templates.