I have a decent sized library of probably around 2-300 books, and it has been on my list of projects to-do to make a catalog/database for my library to quickly reference what I have. Do any of you catalog your libraries and if so what do you use for it?

I know Libid and LibraryThing are two of the big website/app ones, and it could be done with a Google Sheet or similar, but I was wondering if anyone here has any experience before I really get started.

So I have a have maybe a few hundred books at home and I think it's time I put together a collection of what I have. I'd love a database of author / title / publication year / physical location that I could search through ideally.

Is there software that can help with this? I had a brief look at LibraryThing, but I think it costs money for the quantity of books I'm looking at. I briefly toyed with the concept of making my own app that could scan an ISBN to speed up the process (since most will have ISBNs). I wonder what the people of Tildes suggest? Has anyone here done something similar?