Another shout for Homebox. I used to use a spreadsheet but over time found I simply didn’t maintain it but I’ve found I always maintain Homebox.

Homebox allows parent/child relationship between items & exports to spreadsheet.

I dont utilise the QR code facility because my family members would not bother to use QR codes. Instead I’ve numbered all boxes in each location (attic, garage, basement etc), printed contents of each box & put the printout into physical folders left in each location so even the most Luddite in my family can easily locate stuff then, in theory, remember where they took it from & if the stars align & its my luck day, put the item back in the same box that they removed said item from. When that happens I always check my lottery numbers too!

They can’t filter/search a physical printout but at least they can find stuff (I guess I should simply add a QR code to each printout for a best of both worlds solution).

Overall I’ve found Homebox a useful, simple & fun tool